Oxygen Acetylene Brass Quick Connect for Torch, Cutting Torch Copper Quick Connects Fittings, 9/16"-18 B Fittings, Flashback Arrestor for Victor Torch, Check Valves for Torch. 【Universal Compatibility】 Cutting torch to hose quick connect set which is designed for compatibility, fitting for 9/16"-18 B, making them a versatile choice for various welding projects and applications.