The Power Soccer Shop Plastic Guard is sturdy and light and adjustable to most power wheelchairs (attaches to leg-rest). It mounts with nuts, bolts and clamps. Northeast Passage is happy to consult on the best setup for your chair. The 13" ball is used in the game of Power Soccer (the guard maneuvers the ball around the course). We rent the guard and ball separately or together. Long term rentals available. Please inquire about availability.