Forney 85339 Mig Gas Diffuser for MIG Welder, Tweco Style, (#35-50) 174-Inch long replacement gas diffuser Efficiently disperses shielding gases for smooth, spatter free welding on older Forney and Tweco compatible MIG guns Features four gas holes, male threads with M9 by 125-6G thread size and conductive tub Machined from 360 brass alloy bar stock