Mayco Industries 0018-12 Roll Flashing, Lead, 12-In. X 20-Ft./50Lb. Lead Flashing Size : 12" x 20'/50 lb 1.0mm thick, 3/64" For building, industrial, waterproofing, and shielding requirements Rolled from 99.5 percent pure lead or better 2.5 pound per square foot thickness