The tube kit shown here transforms your Walker Bay 10 boat into a Rigid Inflatable Dinghy and they increase load and horsepower ratings. (6 hp) This fun stable little boat was bought to give the grand kids something safe to use at the lake. It has been in the water three times since we bought it and its getting a little to much for the wife and I to muscle it around. The boat retails for about $2600.00 at local shops. It is in original condition and ready to go..