... Detailed information:alu zinc steel coil/sheet/strip Standard: AISI, ASTM, BS, DIN, GB, JIS Grade: DX51D Thickness: 0. ... Treatment: aluzinc coated Application: roofing sheet, construction,sandwich panel,metal wall and so on.Width: 30-1500mm Length: according your ... 3 circumferential bands in steel,galvanized metal fluted rings on inner and outer edges,galvanized metal & water proof paper wall ...