Quantum Storage Systems WR63-2424BK Starter Kit for 63" Height 4-Tier Wire Shelving Unit, Black Finish, 24" Width x 24" Length x 63" Height Kit comes complete with 4 posts and 4 shelves All welded construction with additional wire trussing for high strength characteristics Wire allows air to circulate and light to penetrate for increased product visibility 600 lbs capacity per shelf, Minimal dirt accumulation Measures 24" wide x 24" long x 63" high