... for HR, TW, BN, ES, PN, OT, KP, TR, FR Welding contact tip, material Cu-E / CuCrZrHR type: M5*18, M6 ... : M6*27, M8*37, M6*30, M6*40TR type: 5/16'' UNC*34, 1/4''UNC*30FR type: M8*35, M10 ... . with neutral packing , 50pcs/bag2. with thermopack , 10pcs/box Mig Welding Torch Contact tip