Product Description Material:metal Size: 5.9 * 7.4 * 3.9 inch (15 * 19 * 10 cm) Weight: 800g br> Retractable book stand, freely adjustable according to the number of books. Thickened steel material, not easy to deform, durable. The edges are smooth and will not be scratched. The chain tension design on the back makes the structure more stable. Desktop organize is easier, you can quickly find books. Multi-function, large storage space.