10 ft MIG Gun Replacement w/ Bonus Kit fit Lincoln MIG Pak 140 MIGPak 12104 Welder Attention: Due to the existence of multiple versions of Lincoln's MIG Pak 140 welder, please check and verify that your welder's code number is 12104 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.