This gun is a direct replacement for the GA-20C, GA-21C and M-25 169598 welding guns
Use standard Miller front consumables uses the same 169 726 gas nozzle, the same 169 728 tip adapter, the same 169 729 nozzle adapter, and the same contact tips as the OEM Miller gun .030"-.035"(0.8-0.9MM) diameter welding wire
It fits all of the following models: Millermatic 200, 210, 212, 250, 250X, 251, 252 and Vintage