Champion Sports Ball Storage Cart This space saving cart is made of schedule 90 plastic pipe. Holds up to 9 exercise balls. Comes with 4 heavyduty swivel casters for easy movement. Assembly required. Balls not included. 62inL x 18.5inW x 67inH. This space saving cart is made of schedule 90 plastic pipe. Holds up to 9 exercise balls. Comes with 4 heavyduty swivel casters for easy movement. Assembly required. Balls not included. 62inL x 18.5inW x 67inH.