1 pc Drive Roll V Groove .023 .030 .035 fits Lincoln Core PAK 125 CorePAK 12107 Welder Attention: Due to the existence of multiple versions of Lincoln's Core PAK 125 welder, please check and verify that your welder's code number is 12107 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.