Quick Release Gas Coupler, Compatible with Series W-180, W-200, W-225, W-250, W-280, W-310, W-350, W-375, W-400, W-410, Compatible with Model CS310, CS410, W-375, WP-18, WP-18SC, WP-2-, WP-20P, WP-24W, WP-25, WP-280SC, Welding Processes TIG Welding (GTAW), Type Quick Connect Gas Hose Coupler, Compatible with Brand Weldcraft, Features Allows for quick connection and removal of torch shielding gas hoses, For Gas Type Air, Ar (Argon), CO2 (Carbon Dioxide), He (Helium), N2 (Nitrogen) WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -