GTT Kobuki Glass Torch

The GTT Kobuki is Glass Torch Technologies’ showpiece, a three-stage, 49-jet Triple Mix bench torch built to be many torches at once. It stacks a 7-jet Lynx center, a 15-jet Phantom middle, and a 27-jet outer ring, and GTT says the result can imitate the Lynx, Phantom, Mirage and Delta Elite flames as well as its own wider Kobuki flame. In other words, it’s a single torch that spans a pinpoint to a broad soaking flame, though GTT’s production burners (the Delta Mag, Cobra and Viper) go larger. An optional compressed-air path rounds it out.

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. With three independently usable stages, the Kobuki scales from the fine Lynx center all the way up to large-boro heat, which is how it manages to stand in for so many models in the line. 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.

The compressed-air option

The Kobuki can be ordered with GTT’s compressed-air path, which injects air into the fuel system so you can lower flame temperature while keeping the same flame chemistry and flame type, the documented idea behind GTT’s 4-Way Mix torches. It’s a useful lever when you want a cooler flame without otherwise changing how the torch behaves. The full explanation is in GTT compressed air & 4-Way Mix.

GTT sells the Kobuki at $3,550 and with its compressed-air option. The version picker at the top of the Specs section lists each one with GTT’s own name, its price as GTT’s pages showed it on 2026-10-06, and what GTT’s listing says about it; prices change, so confirm with GTT.

GTT’s own pages disagree on the outer ring: the Kobuki model page lists 27 jets and the store listings list 32, both around a 7-jet Lynx center and a 15-jet Phantom middle; our catalog’s 49 jets follow the model page. Its instruction sheet describes nine valves (red fuel, green main oxygen and blue secondary oxygen for each of the three fires) and sets fuel at 10 psi and oxygen at 40 psi, matching the Flow Rate Chart. It ships with 2 feet of 3/16 inch hose, screened adapters for 1/4 inch ID grade T hose, the base, instructions and a cleaning kit, plus a DVD on GTT’s store listing; custom color adds $200. For the air option, GTT specifies clean, dry air regulated to 60 psi or lower. GTT gives no delivery date and notes that material availability can delay torches.

Who the Kobuki is for

The Kobuki suits advanced makers and production studios who want one torch that does everything, detail one minute, large boro the next, and are happy to feed and pay for that versatility. It’s not a beginner’s torch and it’s wasted on detail-only work.

Glass, fuel, and oxygen

The Kobuki burns propane or natural gas with oxygen and runs both boro and soft glass. GTT’s Flow Rate Chart, measured on propane at the largest usable flame, lists it at 10 psi fuel and 40 psi oxygen; GTT notes natural gas burns roughly 2.5 times the propane volume, and GTT torches on natural gas covers house lines. As a three-stage production-class torch its oxygen demand is high, realistically tanked oxygen or multiple concentrators. Our catalog carries a ~33 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.

Where it sits in the GTT lineup

The Kobuki is the versatile flagship of GTT’s multi-stage bench torches, sitting alongside the production-class burners like the Delta Mag. It’s built around the same Lynx center and Phantom middle as the rest of the line, which is precisely why it can imitate them, the flame behavior you learn on smaller GTTs is all there in one torch.

Before you buy

Budget for the whole system, not just the torch: an oxygen supply sized to a three-stage torch, the correct propane or natural-gas regulator (plus an air source if you take the compressed-air option), 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. On the torch itself, GTT’s servicing page states a one-year warranty against factory defects that does not cover damage from improper use, misuse, or neglected maintenance; if you’re buying used, work through the used GTT torch checklist.

Editor’s note: spec details reflect GTT’s own materials. The catalog’s ~33 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.