The Lincoln K3269-1 Magnum Pro 100SG spool gun is a complete, easy spool gun kit for doing work on aluminum that is designed to work with your Lincoln MIG welder. It's designed to work with all aluminum alloys, and the recommended wire diameters can be fed with the same drive roll and liner assembly. The gun has been ergonomically designed. MIG. Wire Diameter Range. .023-3/64 in. (0.6-1.2 mm) The Magnum SG a lightweight, well balanced semiautomatic spool gun designed for easy and reliable aluminum wire feeding with a variety of CV power sources and engine-driven welders. Rated 250 amps @ 60%, the Magnum SG features a generous 25 ft (7.5 m) gun cable and integrated wire feed speed.