50FT R-Grade Welding Hose: Our 50FT x 1/4-inch oxygen acetylene rubber hose supports 300 PSI maximum working pressure and 900 PSI bursting pressure. All-weather and wear-resistant, it operates reliably in temperatures from -22°F to 158°F, ensuring smooth gas flow while preventing hose tangling. Auto Rewind: With this auto-rewind welding hose reel, managing your hose is simple and tangle-free. Simply give the hose a gentle tug and it will retract smoothly. The reel also has 4 non-snag rollers that reduce hose wear and abrasion. And you can adjust the stopper to lock the hose at any desired length. Easy to Distinguish & Connect: Designed with a distinguishable color-coding system - the red hose is for acetylene and the green hose is for oxygen. Featuring 9/16'-18 left-hand thread on the acetylene hose and 9/16'-18 right-hand thread on the oxygen hose, these B-style fittings provide a stable and leak-free connection