Airhead Bob Booster Ball floats across the waters surface minimizing the tow rope getting caught under the water, in turns, or the boats wake. This booster ball goes between the boat and the towable while boating to help planing, towing, directional control, visibility, straightens and frees rope in turns and through the boat wake.

This booster ball also helps reduce rope drag, rope spray, and snap backs. It has a heavy gauge PVC bladder and a heavy duty nylon cover along with a patented speed safety valve for fast inflation and delation with a self bailing draing vent.

This booster ball goes for anywhere from $75 to $120 on the web not including shipping or sales tax where appropriate. 

I purchased this ball new along with a towable and we never had to use the towing ball because of our large boat and higher than normal transom tow point. This Booster Ball is new and in the original box and inlcudes the tow ropes