This Western Enterprises fuel gas flashback arrestor component provides critical safety protection by preventing reverse gas flow and accidental mixing of oxygen and fuel gases in your welding setup. Designed as a regulator adaptor, it offers upstream protection to safeguard regulators and cylinders from potentially dangerous flashback conditions. The color-coded design enhances safety identification for fuel gas service, while internal check valves actively prevent reverse flow that could lead to equipment damage or hazardous gas mixing. This component is engineered to stop flashbacks by preventing ignition of mixed gases, protecting your entire gas delivery system. Gas Type: Fuel Gas Size: B-Size Style: Regulator Adaptor Thread: 9/16 in - 18 TPI Maximum Cutting Capacity: 10 inches Protection Type: Upstream (regulator side) Color-coded for fuel gas identification Internal check valve design Prevents reverse flow and gas mixing This regulator adaptor style flashback arrestor installs between your fuel gas regulator and supply system, providing essential upstream protection for acetylene, propane, and other fuel gas applications. The B-size configuration with 9/16-18 threading ensures proper fit with standard fuel gas regulators and connections, making it an essential safety component for cutting and welding operations where fuel gases are used.