Fabricators can fine-tune arc on Millermatic Model 210 for material as thick as 3/8 in., or as thin as 22 ga. With 7 voltage taps, power source has welding range of 30-210 A. Model 251 welds metal 22 ga to 1/2 in. in single pass and outputs 30-300 A. Active Arc Stabilizer (on Model 251 only) provides better arc starts and stability. Both models include 250 A MIG gun, regulator/flow gauge with gas hose, and removable tool compartment.