HTP America® ER5356 alloy aluminum MIG welding wire on a 12", 16 lb. spool. Precision wound wire recommended for use in HTP America Pro Pulse 300 welder (16lb rolls not recommended for Pro Pulse 200 or 220) for single and double pulse welding. Available in the following diameters: .035" and .047". This wire is made in the U.S.A.