Uniweld’s K37 Air/Acetylene Soft Flame Kit has always been the Old Reliable flame tool for plumbers, producing 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. Capabilities can be expanded to solder up to 4 inches and braze up to 1-1/2 inches of copper tubing with optional tips sold separately. Kit Includes: Part No. TH3 Torch Handle with stainless steel ball point rear control valve for accurate gas control and positive shutoff, Part No. S23 Soft Flame Air/Acetylene Screw Connect Tip for soldering up to 1/2 inch and brazing up to 3/8 inch copper tubing, Part No. RB Acetylene Regulator with protective rubber gauge boot, (A) hose outlet connection and CGA520 rear inlet connection for (B) tank (Tank Not Included – Sold Separately), Part No. H12 12.5 Ft. Acetylene Hose with (A) fitting connection, Part No. WO5 Tank Key with Security Chain.