Sturdy design with galvanized metal casing for use in tough environments. Electronically controlled feeding gives accurate and stable arc. The 4-roll feeder mechanism with grooves in both feed roll and pressure roll gives stable feeding and low wear on the wire, all to avoid operational disturbance.The feeders are available with 1.2 in. (30 mm) diameter rollers for wires .023-1/16 in. (0.6-1.6 mm) Steel, Stainless Steel, and .040 -1/16 in. (1.0-1.6 mm) Aluminum.Choose your level of control with MA23 and MA24 which provide more functionality than a the Warrior® Feed wire feeders, but less than the Aristo® Feed wire feeders.