Roll and 4roll version with gear driven pressure roll and free driven pressure roll wire dia 0. 6, 0. 8, 1. 0, 1. 2, 1. 6, 2. 0, 2. 4, 2. 8 wire feed rate 3m / min to 25m / min. feed roll dia 30mm and 37 mm motor : 18, 24, 36, 42, 110 volts dc 40, 80, 120 watts 30 to 210 rpm application: mig or tig welding machine wire feeder