perforated band/perforated strip /steel band with different lenght and panited with different colour perforated band/perforated strip /steel band Materials: pre-galvanized steel, thickness 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm Surface finish: zinc-plated, H.D.G., powder-coated Application: apply a safety factor when calculate loading .