What is the GTT Cobra built for?

Furnace-size flames, fast melt-ins, and production. It's a three-stage, 130-jet Triple Mix torch, a 7-jet Lynx center, a 33-jet Mirage middle, and a 90-jet Cobra outer, that offers the Lynx, Mirage, and a wide Cobra flame in one torch.

How big a flame does the Cobra make?

With a 90-jet outer ring on top of the Mirage middle and Lynx center, the Cobra reaches furnace-size flames for large boro, while the Lynx center keeps a fine flame available for detail.

Is the Cobra a good first torch?

No, it's an advanced, production-class burner. Beginners should start with a single-stage GTT like the Bobcat or Cheetah and a much smaller oxygen supply.

Both are listed, but the Cobra is a large-boro and production torch at heart; soft-glass beadwork is far better matched to GTT's smaller torches.

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GTT Cobra: a three-stage, 130-jet Triple Mix torch for furnace-size flames

Name: Glass Torch Technologies Cobra
Brand: Glass Torch Technologies
Price: 5500 USD

GTT Cobra · Bench torch · Surface mix

The GTT Cobra is a three-stage, 130-jet Triple Mix (surface-mix) production torch, a 7-jet Lynx center, a 33-jet Mirage middle, and a 90-jet Cobra outer, that offers the Lynx, Mirage, and a wide Cobra flame, built for fast melt-ins and production.

Specs

Mix type: Surface mix
Mount: Bench
Oxygen (estimate): ~65 LPM
Fuel: Propane, Natural gas
Skill level: Advanced
Glass: Soft, Boro
Best for: Production, Large boro, Furnace-size work
Price: ~$5,500 (reference)
Jets: 130
Stages: 3

Treat the oxygen figure as a rough sizing estimate, not a specification. Depending on the model it may be manufacturer full-flame consumption, a converted flow figure, or a documented estimate, and delivered pressure and purity matter as much as flow. What actually drives a torch choice is the glass, the work, and the flame, so size your oxygen supply after you pick the torch. Prices may be manufacturer list prices or observed dealer references. Use the evidence label and sources below, then confirm the exact configuration before buying.

Overview

The GTT Cobra is one of Glass Torch Technologies’ furnace-class burners, a three-stage, 130-jet Triple Mix torch built around a 7-jet Lynx center, a 33-jet Mirage middle, and a 90-jet Cobra outer fire. It offers the Lynx, Mirage, and a wide Cobra flame in one torch, and it’s built for fast melt-ins and production at a scale most makers never need. This is heat for moving large masses of glass quickly.

What the three-stage Triple Mix flame gives you

Triple Mix is GTT’s surface-mix technology: fuel and oxygen meet at the face of the torch, keeping the mixing chamber cool and giving a clean, penetrating flame that drives heat into the core of thick glass rather than just washing the surface. With three stages and a 90-jet outer, the Cobra spans from a fine Lynx center flame to a furnace-size soaking flame. For the underlying tech see GTT Triple Mix technology and surface mix vs premix torches; for why penetration matters on heavy boro, read soaking vs penetrating flame.

Who the Cobra is for

The Cobra suits advanced makers and production studios who genuinely need furnace-size heat and fast melt-ins, high-volume boro production rather than detail or soft-glass beadwork. Its oxygen appetite and price put it firmly at the top of the line.

Glass, fuel, and oxygen

The Cobra burns propane or natural gas with oxygen. As a three-stage furnace-class torch its oxygen demand is very high, realistically a substantial tanked-oxygen supply or many concentrators. Our catalog carries a ~65 LPM reference converted from GTT’s flow table for the largest usable flame; size your supply to the flame you actually run and confirm with GTT. Start with how many LPM does my torch need and plan your supply with oxygen concentrator vs tanks.

Where it sits in the GTT lineup

The Cobra is near the top of GTT’s range, among the furnace-size three-stage torches alongside the Viper. It’s built on the same Lynx center and Mirage middle as the rest of the line, so even at this scale the flame behavior is familiar, the Cobra simply wraps a very large outer fire around a core you already know.

Before you buy

Budget for the whole system, not just the torch: an oxygen supply sized to a furnace-class torch, the correct propane or natural-gas regulator, flashback protection matched to your torch and gas supply, didymium or boro-rated eyewear matched to your glass, and serious ventilation. New to plumbing a torch this size? Start with the fittings, hoses & connectors guide and the glass torch safety setup guide.

Editor’s note: spec details reflect GTT’s own materials. The catalog’s ~65 LPM oxygen figure is converted from GTT’s flow table for the largest usable flame (a ceiling, not a minimum), and current configuration details should be confirmed with GTT before purchasing.

Fit and tradeoffs

Best for: Advanced makers and production studios needing furnace-size heat and fast melt-ins, with a fine Lynx center flame still available for detail.

Not for: Beginners, detail-only work, or anyone on a small single concentrator, this is a very thirsty, production-class burner.

Pros

+ Three-stage Triple Mix: 7-jet Lynx center, 33-jet Mirage middle, 90-jet Cobra outer (130 total)
+ Offers the Lynx, Mirage, and a wide Cobra flame in one torch
+ Furnace-size heat for fast melt-ins and production
+ Penetrating surface-mix flame that drives heat into the core of heavy glass
+ Fine Lynx center flame still available for detail

Cons

− Very high oxygen appetite, plan a substantial tank or multi-concentrator supply
− Pro price band; a major production investment
− Built for large boro, not soft-glass beads or fine detail alone
− Some oxygen figures are converted from CFH and prices vary by configuration; confirm the exact setup with GTT

Flame notes

3-stage Triple Mix: 7-jet Lynx center + 33-jet Mirage middle + 90-jet Cobra outer = 130 jets total. Flame types of the Lynx, Mirage and the wide Cobra flame; built for fast melt-ins and production.

Maker

Glass Torch Technologies

USA

Focus: Boro, Production, Pipe, Soft

Tioga, Pennsylvania maker of standard surface-mix, patented Triple Mix, and 4-Way Mix glassworking torches. GTT says it machines, builds, and tests its torches by hand.

Visit website →

Compared with

Head-to-head guides that put the Cobra against other torches.

FAQ

What is the GTT Cobra built for?: Furnace-size flames, fast melt-ins, and production. It's a three-stage, 130-jet Triple Mix torch, a 7-jet Lynx center, a 33-jet Mirage middle, and a 90-jet Cobra outer, that offers the Lynx, Mirage, and a wide Cobra flame in one torch.
How big a flame does the Cobra make?: With a 90-jet outer ring on top of the Mirage middle and Lynx center, the Cobra reaches furnace-size flames for large boro, while the Lynx center keeps a fine flame available for detail.
Can the Cobra run on an oxygen concentrator?: It's a very high-output three-stage production torch, so its oxygen demand is far beyond a single small concentrator. Our catalog carries a ~65 LPM reference converted from GTT's flow table at the largest usable flame, so plan around a substantial tanked-oxygen or multi-concentrator supply and confirm with GTT.
Is the Cobra a good first torch?: No, it's an advanced, production-class burner. Beginners should start with a single-stage GTT like the Bobcat or Cheetah and a much smaller oxygen supply.
Soft glass or boro?: Both are listed, but the Cobra is a large-boro and production torch at heart; soft-glass beadwork is far better matched to GTT's smaller torches.

Sources

https://www.glasstorchtech.com/cobra