Miller Mig Replacement Parts:Consumables, Contact tips, nozzles, gas diffusers and liners and more for Miller and Hobart Style welding guns. GA21C & CM, GA-40C, GA-40CAL, M-15, M-25, M-40, H-10, H-14. Warning!! Beware of the Low Quality of some of the import products found on the Internet. Poor Fit and Soft Materials lead to faster wear out and additional costs. We offer only OEM Quality Replacement Parts.