For quality, insist on the Hoke-Jewel Torch, most widely used by professional jewelers for daily work.  Ideal for precision metal melting, soldering, brazing, and welding.  Fingertip control of valves and selection of tips allow user to select type of flame required, from large brush to pinpoint.  Valves work easily and surely, with precise mixing of gas and never any leakage.  All parts are machined from solid brass stock and seamless brass tubing and are completely nickel-plated.  Overall length is 9" (229 mm).  Inlets use standard 1/4" (6 mm) hose.