... : blackMaterial:high-quanlity carbon steelPackage: FST18-FST25:3,000pc per box, 10 boxes per case. FST30-FST50:1,500pc per ... box, 10 boxes per case. Features:high-quality carbon steel, modern ... decoration, boiler, automobile manufacturing, advertising metal frame, glass curtain wall, color steel plate, light steel keel, gypsum version of the fixed and other ...