... bandInside diameter of coil:508mmNote: 1,Nominal thickness of steel band is the thickness without coating.2, We can ... the special surface coating and structure endow pre-painted steel a great mobility and plasticity in every application ... wall, water conduit, balcony, booth, roller shutterindoordoor, door case, steel building- structure, folding screen, ceiling, elevator, corridor, air chuteElectric ...