Lead Sheet has multiple uses, including radiation shields, packing and sealing material, gasketing, ballasts, and corrosion resistance lining. All forms are 99.9%+ and meet FED Specifications ASTM B749-03 & QQ-L-201f Grade C. These sheets have a tolerance of +/- .005 on thickness and 1/8" on cut sizes. Shipping - Lead is rolled up and sent in a box.