This is the inflatable tow ball that spins 360º on its horizontal axis while careening across the water behind a boat. Spanning 78" in diameter, the ball is composed of two hulls, an outer shell that glides across the water and a recessed 60" diameter inner shell suspended by 114 shock absorbing nylon cords, forming a human sized open-ended sphere that accommodates one rider up to 250 lbs. The swivel joint that attaches the ball's front to a boat's tow rope enables a rider to push against the interior using three sturdy handholds to begin (or counteract) the spinning motion--the chamber's shock absorption lets riders enjoy the inherent jostles, caroms, and rotations that result from a full-speed joyride. Durable 24-gauge PVC construction withstands bumps, scrapes, and repeated buffeting by water and rider. Heavy duty valve provides easy inflation using a pump (sold below). 78" Diam. (30 lbs.)