Mild steel – 80 A, 130 A, 170 A – O2/Air Figure 1. Mild steel 80 A – 170 A consumables 1 Shield retaining cap 2 Shield 1 3 Nozzle retaining cap 4 Nozzle 5 Swirl ring1 6 Electrode 7 Water tube 1 The bottom part number is for mirror cutting only.