Quantum Storage Systems M2436C46 4-Tier Wire Shelving Mobile Cart with 5" Stem Casters, 4 Wire Shelves, Chrome Finish, 69" Height x 24" Width x 36" Length Four-tier wire shelving cart made of chrome-finished carbon steel has stem casters and four shelves Wire shelves have welded construction and are reinforced with wire trusses and struts for strength Four 5" polyurethane swivel stem casters with brakes on two casters for control and maneuverability Rubber donut bumper on each caster helps protect walls and furniture from damage Has an 800 lb. per shelf capacity when evenly distributed across the shelf, total cart capacity not to exceed 1,000 lb.