WeldingCity 5-pk Gas Diffusers 169-728 169728 for Miller Hobart MIG Welding Guns Premium quality Miller Hobart style MIG gas diffuser 169-728 169728 Work with contact tips 000 series for Miller M series and Hobart H series MIG guns. You get Five (5) gas diffusers 169-728 at this price We use U.S. Postal Service (USPS) as main carrier. Please provide a USPS deliverable address.