Keep your jobsite safe and fire free with the ABN Oxygen Acetylene Twin Hose for Welding and Cutting Torches Set. Constructed from acetylene rubber, these turbo torch hoses are flame retardant and resistant to abrasions, cracks, leaks, and kinks to safely transport up to 300 PSI (20.7 Bar) of gas. Flexible from -4 to 158 degrees Fahrenheit (-20 to 70 degrees C) the 15ft (4.5m) available length provides ample distance from flammable gas tanks without tangling. The 1/4in (6mm) inner hose diameter with 1/2in outer diameter attaches color coded lines to your fuel tanks with 4 total B fittings (9/16in - 18 thread). Green oxygen torch lead is outfitted with right hand threads, while the red acetylene torch gas line features left hand threads for added safety. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.