Harris HP 721C Specialty Gas Regulator - CO2 721C015320A filter_Consumable_Size 5 you should choose a CGA

you should choose a CGA 510 male regulator

Genuine Lincoln® MIG Gun Liner for feeding

A rubber seal makes the container moisture resistant and protects your stick electrodes

and the laser etched size markings with black ink fill improve visibility

All welding power sources equipped with female 25mm (mini) Dinse receptacles

Harris HP 721C Specialty Gas Regulator - CO2 721C015320A filter_Consumable_Size 5 you should choose a CGAHarris HP 721C Specialty Gas Regulator CO2 (Carbon Dioxide) with Chrome Needle Valve Outlet 721C015320A The Harris HP 721C 015 320 A specialty gas regulator is a single stage, chrome plated brass, high purity regulator with CGA 320 (Carbon Dioxide) inlet and chrome needle valve outlet. It features a 316L stainless steel diaphragm and a one piece encapsulated seat with sintered filter to prevent contamination. The HP 721C is recommended for gas purity