Steel Coil & StripChina Thickness 0.47mm Galvalume Steel Coils with ASTM a 792 and a 755 Base Coating Alloy Aluminum and Zinc 150G/M2 Painting Top Side 20 Micros with Ral Color 9003, Find details about China Building Material, Prepainted Steel Coil from Thickness 0.47mm Galvalume Steel Coils with ASTM a 792 and a 755 Base Coating Alloy Aluminum and Zinc 150G/M2 Painting Top Side 20 Micros with Ral Color 9003