· High quality 304 stainless steel or galvanized steel with powder coating, anti-rust, anti-corrosion, waterproof, outdoor use is ok. · Modern design, use more than 0.5mm thickness steel. · Strong metal tube, the structure is substantial. · Suitable for home use or display in book shop. · We are the manufacturer(supplier), many hot sales models wholesale with high quality and low price. · Customized OEM is available in our factory.