5 pcs Nozzles 1/2" Flush fit Lincoln Pro Core 125 ProCore 11631 Welder Attention: Due to the existence of multiple versions of Lincoln's Pro Core 125 welder, please check and verify that your welder's code number is 11631 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.