The Go System Blow torch is manufactured from strong durable brass & is suitable for a variety of DIY tasks. The Valve incorporates a fine tune regulating valve that’s offer precise control of the flame. The torch is manual ignition and comes with a stability base included. The torch is for use with Go System 2172, 2289 or 2350 mixed gas (Propane/Butane) cartridges supplied separately. The refill cartridges contains 170g, 277g & 350g respectively of mixed Propane/Butane Gas and cannot be refilled by the customer.