Weldmark® by Tweco® 11 Series Brass Gas Diffuser is perfect for use with slip-on nozzle assemblies with 180 A Tweco® No. 1 MIG gun series as well as eliminator front-end consumables. Gas diffuser has magnificent electrical properties making it ideal for use in light to medium duty standard welding application up to 180 A. 1.99" Gas diffuser with M10 x 1.5-6g thread size has four 0.094" gas holes. It features part number rolled stamped on the external surface and overall length for easy identification. Gas diffuser is made from 360-brass alloy bar stock offers consistent dimensional stability. It has a proper threaded size conductor tube to be used with MIG guns. It features machined threads on the external surface to let the nozzle assemblies to thread over and accommodate the nozzle in place during the welding process. Gas diffuser is sold as 5 per pack.