MetroMax® Q Mobile Shelving Unit, 24″W x 54″D x 80″H, 4-tier, 600 lb. capacity per shelf, 900 lb. capacity per unit, includes: (4) quick‑adjust shelves constructed of one‑piece epoxy‑coated frames, removable open‑grid polymer shelf mats with Microban® protection, (4) bags of wedges, (4) polymer posts, (2) swivel & (2) swivel/brake polymer stem casters, (4) bumpers, 1″ shelf adjustment, KD, NSF