Gas Diffuser, Compatible with Brand Miller, Series FasTip, Gas Diffuser Number 229670, Compatible with Series XR-Aluma-Pro, Compatible with Model 300001, 300003, 300004, 301568, 301569, 301570, 301571, 301572, 301573, Duty Rating Heavy Duty, For Contact Tip Series FasTip, For Nozzle Series FasTip, Welding Processes MIG Welding (GMAW), Connection Thread Type Slip-On, Diffuser to Tip Relationship 1/8 in Recess, For Use With XR-ALUMA PRO, Material Aluminum, Outside Diameter 0.312 in