1 pc Drive Roll U Groove .023 .030 fits Lincoln Pro Core 125 ProCore 12100 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 12100 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.