Designed to be lightweight and compact, the Champion Sports 9 Ball ABS Storage Cart is a simple way to organize exercise balls at any gym or workout facility. Constructed with schedule 90 plastic pipe, this ball storage cart is both strong and lightweight, making it easy to move around the gym regularly on the heavy-duty swivel casters. Material(s): Schedule 90 Plastic; Overall Material Type: Plastic; Color(s): White; Color Family: White.