... Product Quality Certificate Specifications: 1)Thickness of the galvanized steel coil: 0.15mm-2.0mm 2)Thickness tolerance of ... oiled, minimum or regular spangle 7)Quality of the galvanized steel coil: Commercial quality (soft and hard), lock ormingquality,drawing ... , auto parts, electrical appliances, vending machines, refrigerators, ovens, for pre-paint. structural use, roofing, commercial use …etc