Quantum Storage Systems WR54-1824BK Starter Kit for 54" Height 4-Tier Wire Shelving Unit, Black Finish, 18" Width x 24" Length x 54" 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 800 lbs capacity per shelf, Minimal dirt accumulation Measures 18" wide x 24" long x 54" high