... Steel Coils Standard: GB, ASTM, DIN, BS, JIS, and ISO. Steel Grade: SPCC, ST12-ST14, DC01-DC04, SPCC-1B, SPCC-SD Thick Cold Steel ... black finish, slit edge7.Main application: Base material for the prepainted galvanized steel coilThe construction industry:The roof structure, keel, clapboard, ceilings ... good business relationship with you.Contract :Sadie Li MP:8613516205726 Sell Cold Steel Coils