Product Details + Features 18 oz. bronze silica. Heavy duty, molten metal, sparks, spatter. 1800°F working temp, 3000°F melt temp. .03” thick. Sizes 36” wide 50 yard rolls, 3'x3', 6'x6', 6'x8', 9'x10', custom blankets. FM APPROVED WELDING CURTAIN Dimensions 6' x 8'