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

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. GTT doesn’t publish the Cobra’s exact LPM, so size your oxygen around the work you actually do 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 arrestors on both lines, didymium eyewear, 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. GTT doesn’t publish the Cobra’s exact oxygen flow (LPM) or current pricing, so confirm those specifics with GTT before purchasing.