2 pcs Gas Diffusers Tip Holders fit Lincoln Work Pak 125 WorkPak 11506 Welder Attention: Due to the existence of multiple versions of Lincoln's Work Pak 125 welder, please check and verify that your welder's code number is 11506 before making a purchase. The code number for Lincoln welders can be found on the number plate of the welder and is a 5-digit code.