... :Q235,Q195,Q345 Brand name:RF Finished:black iron,HDG,spray paint thickness:0.5mm to 15mm Main ProductsZ steel structure ... as you requestSurface Treatmenthot dipped galvanized,electrogalvanizing,spray paintMateriaQ235,Q195,Q345Surface Treatment:hot dipped galvanized,electrogalvanizing,spray paint aisi spray painting c channel steel