The heavy-duty plastic construction is lightweight and durable, designed to handle applications from health care to industrial. The 8˝ fully pneumatic casters and all plastic design provide a cushioned, quiet ride that is ideal for transporting fragile items over rough surfaces. Derma-Tek smooth skin, non-porous finish is easy to clean and provides a professional appearance that will not peel, chip, crack or fade like conventional metal units. Supports 200 lbs. per shelf, 400 lbs. maximum capacity. Compatible with 5806 Optional Center Shelf.