Gem Bids For Purchase Of Welding Electrodes For Asset Workshop, 4530 Welding Electrode 7018- 3.15mm Welding Electrode 7018- 4 Mm Welding Electrode 7018- 2.5 Mm Welding Electrode 308l- 3.15mm Welding Electrode Cast Iron - 3.15mm Welding Electrode Cast Iron - 2.5mm