... anticorrosion 4.Zinc coating:60-275g/m GI/Galvanized steel coil StandardASTM A653, JIS G3302,GB/T3830-2006GradeDX51D,SGCC ... size:914mm,1000mm,1200mm,1219mm,1250mm,)Base metalGalvanized steel coils, aluzinc steel coilsZinc coating60-275gsmCoil ID508mm&610mmCoating thicknessTop:18-25um ... in the middle and outside GI steel sheet to be covered by steel strips with lock, with inner coil sleeve.DeliveryWithin ...