Olympic wire shelving made of carbon-steel will exceed all your storage needs. Open construction allows use of maximum storage space of cube. Each unit includes 4 posts, 4 shelves, 4 rubber swivel stem casters - 2 with brakes, 2 without - 4 donut bumpers and split-sleeves to attach shelves to posts. Black finishes are perfect for retail applications.  Product Features: Open wire design that minimizes dust accumulation and allows a free circulation of air.  Greater visibility of stored items and greater light penetration.  Can be loaded/unloaded from all sides.  Wire shelving that can change as quickly as your needs change.  Shelf wires run front to back allowing for items to slide on and off shelves smoothly.  Shelves can be adjusted at 1" intervals along entire length of post.  Weight Capacity for mobile units is 600 lbs. per unit.  NSF Approved