Lincoln Electric - Excalibur 8018-C3 MR Part # ED034039. Diameter: 3/32 inch. 2.4 MM. 50 pound easy open can. AWS: E8018-C3 H4R. Top Features: Designed to produce a 1% nickel deposit. Premium arc performance. Square coating burn-off. Easy strike and re-strike. Effortless slag removal. Typical Applications: Shipbuilding. Piping and gas storage tanks. Weathering steels. Cross country pipe repair. Welding Positions: All, except vertical down.