This Weldmark by Victor welding torch handle is made from Brass, and designed with a straight handle and built in flash arrestors and check valves. It has a UNF 0.5625-18 male threaded connection. It is approved for use with acetylene, propane, butane, liquid air fuel gas, Mapp, natural gas (2 psi & above), and propylene fuel services. Built for heavy duty use in OFW, oxy fuel heating, and brazing processes. Compatible with CA270-V oxy fuel torch series, and WH270FC-V handle series. UL Listed.