Uniweld K37 Air/Acetylene Soft Flame Kit for B Tank with TH3 Handle and S23 Screw Connect TipAir Acetylene Soft Flame Kit has always been the Old Reliable flame tool for plumbers Produces a precise 2700 Degrees Fahrenheit target heat for soldering and brazing copper tubing Capable of soldering up to 1 2 inch and brazing up to 3 8 inch copper tubing with supplied tip Torch Handle with rear control valve for accurate gas control and positive shutoff Acetylene Regulator for B Tank with protective rubber gauge boot