Miller Electric Mfg. Co.™s Spoolmate 100 Series spool gun plugs directly into any of Millermatic 140, 180, and Passport Plus welders without the need for a separate control box. The Spoolmate 100 Series features a recessed contact tip and a clear spool cover to help reduce the number of burnbacks. A burnback is when the wire "burns" back to the contact tip and melts to the tip. This ruins the contact tip. It also features dual V-knurled drive rolls to ensure consistent feeding of aluminum, which lacks the column strength to reliably feed through a standard MIG gun. Users can also adjust drive roll tension to match the wire being used. It comes standard with a 12-foot gun cable, 2 feet longer than most competitive spool guns, and comes in a convenient carrying case that also holds extra contact tips, nozzle and wire spool. For more information call (800) 426-4553 or visit www.MillerWelds.com.