... corrosion resistance zero spangle cooperated with POSCO GROUP Galvanized steel coil Application:Widely used for construction,roofs, prepainting base ... ,Passivated,skin pass, Chromated/unchromated, Unoiled/oiled,anti fingerprint(4)Standard: JIS3302,DIN,ASTM,GB,BS(5)Coil ID: ... 4 circumferential bands in steel, galvanized metal fluted rings on inner and outer edges, galvanized metal and waterproof paper ...