If you have ever tried your hand at lampworking or flameworking, you already know that finding the right glass makes or breaks your entire project. I have spent years working with different borosilicate glass rods, testing variety packs from several suppliers, and learning firsthand what separates a good pack from one that sits gathering dust on the shelf. The best borosilicate glass rod variety packs give you a genuine range of colors and consistencies without forcing you to commit to large quantities of a single shade you may never use.
Borosilicate glass rods are the backbone of lampworking and flameworking. With a coefficient of expansion (COE) of 33, they handle thermal shock far better than soft glass (COE 104), making them the go-to choice for beads, marbles, sculptures, and ornamental pieces. The catch is that boro glass requires a propane-oxygen torch setup, not just a standard map gas canister you might find at a hardware store. That detail alone catches a lot of beginners off guard.
In this guide, our team breaks down five of the top borosilicate glass rod variety packs available right now. We cover everything from small 1-pound starter assortments to bulk 5-pound packs, plus clear stringers and colored tubing. Whether you are just starting out or looking to expand your color library without emptying your wallet, we have a recommendation that fits. I will walk you through what each pack offers, what to watch out for, and how to pick the right one for your specific projects.
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Devardi Clear 5mm Stringers 1 lb
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Devardi Boro Rods 3 lbs Mixed
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Devardi Boro Rods 5 lbs Mixed
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Devardi Boro Rods 1 lb Mixed
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Devardi Boro Tubing 10 Mixed Tubes
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COE 33 Borosilicate
1 lb mixed colors
Rods 10-12 inches
Propane/oxygen torch required
I picked up this 1-pound mixed color pack when I first started lampworking, and it was exactly what I needed to get my feet wet without spending a fortune. The rods arrive in a random assortment, which means every box is a bit of a surprise. In my batch, I found a nice spread of transparent blues, purples, and a couple of striking pinks that looked gorgeous under the torch. For someone just learning how glass behaves in a flame, this variety keeps things interesting.
The rods measure between 10 and 12 inches long, which is a comfortable size for bench work. They fit nicely in the hand and heat evenly with a standard propane-oxygen torch. I noticed that the transparent colors were consistent and produced clean, vibrant results. The pinks and purples in particular had excellent color saturation, and they held up well through annealing without any cracking or checking.
On the flip side, some of the opaque colors in my pack had small air bubbles running through them. The opaque greens were the most problematic. They tended to boil and bubble when I tried to encase them in clear. This is not unusual for budget-friendly borosilicate, but it is something to be aware of if you are planning detailed encasement work. I also had two small rods arrive snapped in half due to shipping, though the rest of the pack was fine.
Overall, this pack delivers solid value for the price. You get a real taste of working with different boro colors without committing to full-size rods of each shade. I would recommend it for practice pieces, experimenting with color combinations, and building confidence at the torch. For professional gallery-quality work, you may want to upgrade to individual color rods from higher-end suppliers later.
This 1-pound assortment shines for bead making and small sculptural pieces. If you are running test beads to see how different colors strike or reduce in the flame, this pack lets you experiment cheaply. I found it particularly useful for practicing color-layering techniques without worrying about wasting expensive glass.
It is also a solid choice for glass fusing projects where you need small amounts of multiple colors. The random selection forces you to work creatively with what you get, which is actually a great exercise for developing your artistic instincts. Beginners who want to explore lampworking supplies without a big upfront investment will get the most out of this pack.
Always preheat your rods slowly in the back of the flame before bringing them into the hottest zone. This prevents thermal shock, especially with the opaque colors that are more prone to cracking. I learned this the hard way with the opaque greens, which tend to check if heated too quickly.
Store your rods vertically in a holder or horizontally in a padded container. The 10-12 inch length means they can snap if left loose in a drawer. If any rods arrive broken, the pieces are still usable for smaller work, so do not throw them away. Just smooth the sharp ends by briefly running them through the flame.
COE 33 Borosilicate
3 lbs solid rods
Rods 10-12 inches
Propane/oxygen torch required
This 3-pound pack sits in the sweet spot between the small starter pack and the full 5-pound bulk option. When I ordered mine, I was looking for enough glass to work through a weekend of practice without running out, and this pack delivered. The color assortment felt more varied than the 1-pound version, likely because there is simply more glass to work with. I pulled out some beautiful saturated ambers, deep blues, and a couple of striking reds that reacted wonderfully in a reducing flame.
The per-pound cost is meaningfully lower than the 1-pound option, which makes this the best value for intermediate glassworkers who know they will use the material. At 3 pounds, you have enough rods to complete multiple projects without feeling like you are rationing every inch. The solid rods heat consistently, and I found the transparent colors in particular to be clean and free of inclusions.
The main challenge with this pack is the solid colors. Several of the opaque and heavily pigmented rods have a tendency to boil when introduced to the flame too quickly. Reds and yellows were the worst offenders in my batch, bubbling up even with careful flame control. The fix is simple but requires patience: you need to warm each rod slowly in the outer flame before working it in the hot zone. Rush this step, and you will end up with a foamy, bubbly mess on your mandrel.
Despite that quirk, the colors are genuinely vibrant once you get the heat management right. The saturation level is impressive for glass at this price point. I was able to produce some beads with rich, even color that looked far more expensive than the material actually cost. For lampworkers who are past the total beginner stage and want to push their color range, this pack offers the best bang for your buck.
If you have been lampworking for a few months and want to expand your color palette without the commitment of buying individual rods at higher prices, this is your pack. It is ideal for hobbyists who work through glass steadily and need enough material to last through several sessions. I also recommend it for anyone teaching a small lampworking class where students need shared access to multiple colors.
This is not the best choice if you need perfectly consistent, defect-free rods for professional pieces. The random selection means some colors will be better than others, and the solid colors require careful handling. Think of it as a workshop workhorse rather than a gallery-quality supply.
The single most important tip I can share is to always preheat solid-color rods in the bushy part of your flame before bringing them to the tip. Count to about ten while slowly rotating the rod in the cooler zone. This drives off any surface moisture and brings the glass up to temperature gradually, which prevents the boiling and bubbling that plagues heavily pigmented boro glass.
If you do get bubbles forming, do not panic. Pull the rod back to a cooler part of the flame and let it settle. You can often rescue a piece by gently reheating it and compressing the bubbles with your marver or a graphite pad. Working with solid borosilicate color rods is a skill that improves with practice, and this pack gives you plenty of material to develop that skill.
COE 33 Borosilicate
5 lbs solid rods
Rods 10-12 inches
Best value per pound
The 5-pound bulk pack is for glassworkers who are serious about building out their color library in a single order. When this box arrived at my studio, it felt like opening a treasure chest. Five pounds of mixed borosilicate rods is a substantial amount of material, enough to keep you working for weeks or even months depending on your project size. The cost per pound is the lowest of all the Devardi variety packs, which makes this the smartest buy if you know you will use the glass.
My assortment included a wide range of colors from transparent blues and greens to opaque whites and a few surprise shades I had not worked with before. The variety was broader than the smaller packs, which makes sense given the larger volume. I appreciated having enough of each color to actually complete projects rather than just test swatches. For bead makers who produce in volume, this pack provides real working quantities of multiple colors.
However, the quality inconsistencies are more noticeable at this volume. Several of the solid-color rods had visible air bubbles running through the glass, and a couple of the opaque rods cracked when I tried to encase them in clear. One experienced lampworker I spoke with on a forum noted that these bulk packs tend to include more seconds and floor-quality rods compared to individual color purchases from premium suppliers. I would not use this glass for commissioned pieces or work that needs to meet gallery standards.
That said, for practice, experimentation, and building your skills at the torch, the value is hard to beat. You get five pounds of genuine COE 33 borosilicate glass that is compatible with all your other boro materials. The colors strike and reduce as expected, and the transparent options in particular perform well. If you are running a workshop or filling a communal studio supply cabinet, this bulk pack is a practical choice.
Choose this pack when you are committed to lampworking as a regular practice and know you will burn through glass consistently. It is the most cost-effective option per ounce, but only if you actually use the material. If you only torch occasionally, the glass could sit for months, and while borosilicate does not degrade with age, it is still money tied up in supplies you are not using.
This pack also makes sense for teachers and studio owners who need to stock shared supplies. Five pounds of mixed colors gives a group of students plenty to work with without worrying about running out mid-session. The random variety means everyone gets to experiment with different colors and techniques.
Inspect your rods when they arrive. Set aside any that have visible cracks or heavy bubbling before you start working. Defective rods can still be used for practice pieces or small detail work, but you do not want to discover a flaw mid-project. I also recommend sorting your colors by opacity level, as the transparent rods tend to perform better than the opaque ones in this bulk format.
Be prepared for some colors to behave differently than expected. The random selection means you may receive colors you are unfamiliar with, which is both exciting and challenging. Keep notes on how each color reacts in your flame, including strike times, reduction behavior, and any compatibility issues you encounter. This information becomes invaluable as you build your skills.
COE 33 Borosilicate
Clear 5mm stringers
1 lb weight
Rods 10-12 inches
Crystal clear
This is the highest-rated product in our lineup, and after working with it, I understand why. Clear borosilicate stringers are the unsung heroes of lampworking. You use them for encasing colored glass, building structure in sculptures, pulling stringer details, and creating clean clear layers in beads. Having a full pound of consistent, high-quality clear 5mm rods on your bench changes how you work for the better.
The clarity of these rods is genuinely impressive. I held several up to the light and could not find any inclusions, seeds, or cloudiness. The refractory index is spot-on, meaning your encasement layers will not distort or muddy the colors underneath. In my testing, I used these stringers to encase several different opaque and transparent boro colors, and every one of them maintained its brilliance through the clear layer. That kind of consistency is rare at this price point.
The packaging deserves a mention too. My order arrived with every rod intact, professionally packed with padding that prevented any breakage during transit. Given how often glass rods get damaged in shipping, this level of care is refreshing. The rods are 5mm in diameter and 10-12 inches long, which is a versatile size for both bead work and small sculptural applications.
The one downside is that these rods are not Prime eligible, so shipping may take a few extra days. The ends are also quite sharp right out of the package, so handle them carefully until you have a chance to fire-polish the tips. I made a habit of quickly running each new rod through the flame to round off the sharp edges before storing them on my bench. It takes two seconds per rod and saves your fingers.
Clear 5mm stringers excel at encasement work, where you layer clear glass over colored cores to add depth and magnification. I used these extensively for creating pendants and beads with visible interior patterns. The optical clarity means the colors beneath stay sharp and vibrant rather than getting washed out by hazy glass.
They are also perfect for pulling your own thinner stringers. Heat a section of a 5mm rod, grab it with tweezers, and pull to create ultra-fine stringers for detail work like dots, lines, and signature trails. Having a full pound of raw material gives you plenty to experiment with different pulling techniques without worrying about waste.
Store these rods where they will not roll off your bench or get knocked onto the floor. A simple glass rod holder or a piece of PVC pipe with capped ends works well. Because the 5mm diameter is relatively thin compared to standard 6-8mm rods, they can be more fragile and prone to snapping if handled roughly. The sharp ends are the biggest hazard, so fire-polish them as soon as you receive the order.
Keep your clear glass separate from colored rods during storage. Even small amounts of colored glass dust or chips can contaminate clear rods and show up as unwanted streaks when you work them in the flame. I store my clear stringers in their own dedicated container, and this simple habit has saved me from many ruined pieces.
COE 33 Borosilicate
10 mixed color tubes
Lengths 11-12 inches
Random color and size selection
13 oz total
With 376 reviews, this is by far the most popular borosilicate variety pack on the market. The 10-piece mixed color tube assortment from Devardi offers something different from the solid rod packs above. Tubing opens up a whole new range of techniques, from blown vessels and hollow beads to structural elements in larger sculptures. When I first ordered this pack, I was specifically looking to practice blowing small hollow forms, and the variety of tube sizes and colors made it a perfect starting point.
The tubes range from 11 to 12 inches in length and come in a random mix of diameters and colors. In my pack, I received a nice spread that included some wider tubes suitable for small blown vessels and some thinner ones that worked well for hollow bead cores. The color selection was vibrant and varied, with a good mix of transparent and opaque options. Each tube had enough length to produce several pieces, so the pack goes further than you might expect from just 10 pieces.
The packaging was excellent. All 10 tubes arrived intact with no chips or cracks, wrapped in protective material that clearly came from a seller who understands how glass ships. This is something the glassworking community on Reddit consistently praises about this particular product. Fast shipping and careful packing make a real difference when you are ordering glass online.
The biggest caveat is the black tubing, which requires a hotter flame than standard colors. If you are using a basic map gas torch, the black tubes will be nearly impossible to work. You need a propane-oxygen setup with an oxygen-enriched flame to get black boro glass moving. Some of the smaller-diameter tubes may also be too thin for certain techniques, so check the sizes before committing to a specific project.
Color tubing is ideal for blown ornaments, small vessels, and hollow beads. If you have been working with solid rods and want to expand into hollow forms, this variety pack gives you an affordable entry point. I used my tubes to practice blowing small perfume bottles and ornament blanks, and the different diameters let me try several approaches without needing to buy specific sizes individually.
Tubing also works well for creating structural elements in larger sculptures. The hollow form adds visual interest and reduces weight compared to solid glass of the same size. Some lampworkers also use colored tubing as the base layer for implosion pendants, where the tube color becomes the background for a pattern created with clear rod and colored dots.
Not all torches can handle borosilicate tubing effectively. You absolutely need a propane-oxygen torch with adjustable flame settings. A simple MAPP gas torch from the hardware store will not generate enough heat for many of the colors in this pack, especially the black tubes. The minimum setup I recommend is a minor bench burner with an oxygen concentrator or bottled oxygen.
For thicker-walled tubes, you will need to rotate the glass constantly to prevent sagging and maintain even wall thickness. Tubing requires a different set of skills compared to solid rod work. If you are new to hollow forms, start with the thinner-walled tubes in your pack before working up to the heavier ones. The learning curve is real, but this variety pack gives you enough material to make mistakes and improve without a huge financial investment.
Choosing the right borosilicate glass rod variety pack comes down to understanding your skill level, your equipment, and the types of projects you want to create. I have bought more variety packs than I care to admit, and there are a few key factors that consistently matter when making a smart purchase.
COE stands for Coefficient of Expansion, and it is the single most important spec on any glass rod. Borosilicate glass has a COE of 33, while soft glass (like Effetre or Moretti) has a COE of 104. These two types are not compatible. If you mix them in the same piece, the glass will crack as it cools because the different expansion rates create internal stress. All five products in this guide are COE 33 borosilicate, so they are all compatible with each other. Never mix them with COE 104 soft glass.
This is one of the most common mistakes beginners make. Someone on a lampworking forum recently posted about their beads cracking overnight, and the cause turned out to be a mix of COE 33 and COE 104 rods they thought were the same. Always verify the COE before you start a project, especially if you have glass from multiple suppliers in your studio.
Solid rods are the standard for most lampworking. You use them for beads, marbles, pendants, and sculptural solid-form work. They come in various diameters, typically 4-8mm for color rods and up to 10-15mm for clear. If you are just starting out, solid rods are where you should focus your time and money.
Tubing opens up hollow-form techniques like blowing small vessels, creating hollow beads, and making structural elements. Working with tubing requires more skill and a torch that can deliver higher heat. If you have mastered solid rod work and want to expand your capabilities, variety packs that include tubing are an affordable way to explore hollow forms without committing to large quantities of a single tube size.
This depends entirely on how often you work and the scale of your projects. A 1-pound pack is enough for a few sessions of bead making or small sculpture work. At 3 pounds, you have material for several weeks of regular practice. The 5-pound bulk pack is best for committed hobbyists or shared studio spaces. Buying more than you need does not hurt the glass (borosilicate stores indefinitely), but it does tie up money in supplies you may not use right away.
For beginners, I always recommend starting with a 1-pound mixed pack to see if you enjoy the craft before investing in larger quantities. You can always order more once you know what colors and consistencies you prefer. Experienced glassworkers who know their preferences often skip variety packs and buy individual colors in bulk, but variety packs remain the most economical way to explore new colors.
Borosilicate glass colors behave differently depending on how you work them in the flame. Some colors are striking, meaning they change color based on how many times you heat and cool them. Others are reducing colors that shift in a fuel-rich flame. Transparent colors tend to be easier to work with than opaque ones, which can bubble and boil if heated too quickly.
When you get a variety pack, take time to test each color before committing it to a finished piece. Make small test beads or chips and label them so you can reference how each color performs. This practice saves time and frustration down the road, especially with a random assortment where you may not know exactly what you are working with until you heat it.
Borosilicate glass is durable, but it still needs proper storage. Keep rods in a holder or container where they will not roll, get knocked over, or accumulate dust. Glass dust on the surface of your rods can cause scum and discoloration when you melt them. I store my rods vertically in wooden racks and cover them with a cloth when not in use.
Handle all rods with care, especially thin stringers and tubing. The ends are often sharp from the cutting process at the factory. Either fire-polish the ends before storage or wear gloves when handling new rods. Broken rods can still be used for smaller work, so never throw away broken pieces. Keep a separate container for scraps that you can use for frit, small detail work, or practice pieces.
Several brands produce excellent borosilicate glass, and the best choice depends on your needs and budget. Devardi Glass offers the most affordable variety packs and is widely recommended for beginners and practice work. For premium professional-grade boro glass, brands like Northstar, Glass Alchemy, and TAG are considered top-tier by experienced lampworkers. Simax is another trusted name known for consistent clear borosilicate rod and tubing. If you are just starting out, Devardi provides the best value for exploring colors without a large investment.
The main downsides of borosilicate glass include the need for specialized equipment and the learning curve it presents. Borosilicate glass (COE 33) requires a propane-oxygen torch rather than the simpler MAPP gas or butane torches that work with soft glass. This means a higher initial equipment investment. Borosilicate also melts at a higher temperature than soft glass, which takes longer to heat and requires more fuel. Color variety in boro glass is more limited compared to COE 104 soft glass, and the colors tend to be less vivid straight out of the flame, often requiring striking or reducing techniques to develop their full color. Some opaque boro colors are prone to boiling and bubbling during work.
Borosilicate glass was not discontinued entirely, but some well-known consumer products made from borosilicate were reformulated. The most famous case is Pyrex, which originally used borosilicate glass in its kitchenware but switched to tempered soda-lime glass in the United States during the 1990s for cost reasons. The switch was controversial because soda-lime glass is more prone to thermal shock breakage. However, borosilicate glass itself remains widely available and is still manufactured by companies like Simax, Duran, and Schott for laboratory, industrial, and artistic applications. For lampworking and glassblowing, borosilicate glass rods and tubing are readily available from numerous suppliers.
Popular brands of borosilicate glass for lampworking and glassblowing include Devardi Glass (affordable variety packs and beginner options), Northstar Glass (premium color rods with striking and reactive colors), Glass Alchemy (high-quality color rods known for consistency), TAG Glass (professional-grade borosilicate colors), Simax (trusted for clear rod and tubing), and Oceanside Glass (formerly known as Spectrum, offering a range of boro products). For laboratory and industrial borosilicate, Schott and Corning are the leading manufacturers. In the artistic glass community, Northstar and Glass Alchemy are often considered the gold standard for color quality and predictability.
Finding the right borosilicate glass rod variety packs comes down to matching your skill level, your equipment, and your project goals with the right product. For beginners looking for an affordable entry point, the Devardi 1-pound mixed color pack gets you started without a big commitment. Intermediate glassworkers who want the best per-pound value should reach for the 3-pound solid rod assortment. And if clarity is your priority, the 5mm clear stringers deliver professional-grade optical quality at a fraction of what you would pay from premium suppliers.
The 5-pound bulk pack is ideal for committed hobbyists and studios, while the 10-piece color tubing assortment opens up hollow-form techniques that solid rods simply cannot achieve. All five products share the same COE 33 rating, so you can mix and match freely across packs. Whatever your lampworking goals in 2026, one of these variety packs will serve you well.
