1lb .035 alum mig wire. Forged mild-steel solid wire on 2 lb. and 10 lb. spools. Provides the smooth clean surface needed for steady, efficient wire feed and features minimal spatter and easy slag removal. Diameter: 0.035", Classification: 4043, Aluminum, Spool Size: 1 lb No. 42298: Diameter: 0.030", Classification: 308er, Stainless Steel, Spool Size: 2 lb No. 42300: Diameter: 0.030", Classification: Flux-Cored E71t-gs, Spool Size: 2 lb No. 42301: Diameter: 0.030", Classification: Flux-Cored E71t-gs, Spool Size: 10 lb No. 42302: Diameter: 0.035", Classification: Flux-Cored E71t-gs, Spool Size: 2 lb No. 42303: Diameter: 0.035", Classification: Flux-Cored E71t-gs, Spool Size: 10 lb