The Material we are using is Electrolytic galvanized steel sheet for all our products, including filing cabinet, mobile filing cabinet, pedestal mobile cabinets, bookshelf and so on. It is different from common steel, which makes product has longer life-circle meanwhile anti-rust ability will be much better All steel construction Powder coated finish Specification for 2 drawers: 900x450x717(W*D*H) Specification for 3 drawers: 900x450x1020(W*D*H) Specification for 4 drawers: 900x450x1320(W*D*H)