Each drive roll is made for a specific wire size and is marked with the corresponding metric code; 0.9 for .035", 1.2 for .045" or 3/64" and 1.6 for .062" wire sizes. These drive rolls fit all PullMig 300 Air Cooled and all PullMig 500 Water Cooled welding gun models. These hardened "U Groove" drive rolls are designed to work with all Aluminum, Stainless Steel and Mild Steel welding wires. Drive rolls are sold separately, 1 pc. per pack. Drive Rolls for PullMig Welding Guns PPGDriveRollElsewhere: $ 49.55Welding Direct Price: Select: #181P101006(.035")0.9mm#181P101003(.045",3/64")1.2mm#181P101005(.062")1.6mm Additional discounts may be available for volume orders. To speak with a customer service representative for details, call, toll free, 1-866-568-3170 . Welding-Direct.com is in no way affiliated with the above named manufacturers. References to named machines, torches, welding guns and numbers is for your convenience only. Most parts advertised for sale are made by or for Welding-Direct.com; other parts, as indicated, are original parts (OEM) and are simply being resold by welding-direct.com. Copyright 2004 Welding-Direct.com. All rights reserved. Details on our Free Delivery policy may be found on our Information page.