Fiberglass Backing Tape, Overall Width 4 in, Overall Length 41 ft, Maximum Current 600 A, Compatible Material Type Carbon, Duplex and Chrome Steel, Metal, Stainless Steel, Features Halogen and Chlorofluorocarbon Free Acrylic Base Adhesive, Increases Weld Productivity, Significantly Reduces Setup Time and Weld Clean Up, Form Roll, Material Aluminum, Fiberglass, Process MIG Welding, SMAW, TIG Welding, Product Type Welding Backing Tape, Resistance Properties Heat