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Description Bossweld 1/2 (13mm) Mixer Torch mixer for use with standard torch handle. Mixes Oxygen and fuel gas for welding and brazing and heating applications Features 10mm mixing chamber - connects welding and brazing tips to torch handle. 13mm mixing chamber - connects superheating barrel to standard torch handle. Suits Comet 3 type torches. Applications Suitable for use with Oxygen/Acetylene & Oxygen/LPG gases