... 3, Zinc: 60--275g/m2 Use to roofs wall Hot Dipped Galvanized steel stripStandard: SGCC, DX51D+Z, ... and outer edges, galvanized metal and waterproof paper wall protection disk, galvanized metal and waterproof paper around circumference ... and bore protection. Surface structure: Surface structureCharacteristicsApplicationNormal spangle (Z)Under ...