Drive Roll Kit Type Drive Roll Kit Compatible with Brand Miller Number of Drive Rolls 4 Maximum Wire Diameter 0.052 in Drive Roll Type V-Groove For Wire Type Solid For Welder Series Millermatic 300 Millermatic 350 Millermatic 350P For Welder Model 903773 907028 907300 907474 For Wire Feeder Model 301499 301499001 951779 951780 For Wire Feeder Series 20 Series 24A 54 Series R-115 Welding Processes MIG Welding (GMAW) Application MIG Welding