Brass Gas Diffuser is suitable to use with 14 Series tips on up to 450 A Tweco® No. 3, Tweco® No. 4 MIG guns. Diffuser is designed in a way so it can be used with slip-on nozzle assemblies and made from 360-brass alloy bar stock that assures consistent dimensional stability. Light to medium duty welding applications can make use of this diffuser, which is sold as 5 per pack.