This regulator is for use with Oxygen Industrial Cylinders with a 540 CGA connection.  For single torch use. Compact regulator provides accurate control for welding, soldering, brazing and heating operations. Color coded for safe and easy identification. Easy-turning T-bar. Heavy duty industrial construction for extended service. Easy to read 2" brass gauges with 1 PSI increments for maximum outlet control, designed for small torch usage. UL listed, 100% tested.   Consider adding a set of Flashback Arrestors with built-in Check Valves for preventing flashback fires and reverse gas flow.  Sold separately, see our 8300812.