U-shaped tubular frame provides superior strength Choose the type of shelf that best fits your needs: - All shelf edges down for easy loading and unloading from all sides - 3 edges up, 1 down to help hold items on the shelves during transport All welded angle leg construction for a stronger structure and easier-to-clean surface Stainless steel is easy to clean and sanitize Extra load No-Mark cushion tread wheels absorb impact for quieter and smoother operation 2 fixed and 2 swivel 8" casters guide cart in a straight line, while making turns easier Extended perimeter strip bumpers add extra protection for walls and furniture Bottom perimeter bumper included