... ,1200mm,1250mm)Inner diameter: 508mm CQ: commercial quality DQ: drawing quality Base metal: HGI, CRCoating materials: Polyester ... , civil construction steel structure workshop, easy building and air clean room as internal&external wall ... -fingerprint/un-anti-fingerprint,CoatingAPPLICATIONStructural use ,roofing, commercial use, household appliance, industry, familySPECIALAPPLICATIONWear resistant steel ...