Sandusky MWS481872 4-Tier Mobile Wire Shelving Unit with 2" Nylon Casters, 4 Wire Shelves, Chrome, 72" Height x 48" Width x 18" Depth Four-tier mobile wire shelving unit has chrome finish, casters and three shelves Adjustable shelves have welded wire construction and are reinforced with wire trusses and struts for strength Open wire design offers visibility of contents, permits air circulation in the work environment, and helps resist dust build-up Four 2" nylon casters with brakes on two casters for control and maneuverability Has a 50 lb. per shelf capacity, evenly distributed