"The Bass Pro Shops Comet Towable Tube Rope with Inflatable Ball delivers big-time tubing fun for the kids, and you get everything you need to make tons of family fun a reality. The Comet tow tube features improved wave-skimming performance for boats, and its low attachment points deliver a wet and wild ride. The Comet, from Bass Pro Shops, even boasts a reinforced inflatable chamber to keep it ready for action for years to come. A Boston valve ensures quick and easy inflations. The included 60' tow rope adjusts in length from 40' to 60' in 5' increments. This rope has a tensile strength of approximately 4,100 lbs., and this means it accommodates up to 4 riders at the same time. This tow tube and rope come with an inflatable ball. The spherical shape of this addition reduces drag during towing, and it improves visibility while keeping the rope above the wake. Floating ball: 41""L x 27""W. Rope length: 40-60"". Improved, wave-skimming performance for boats Low attachment points deliver a fun ride Reinforced inflatable chamber Length-adjustable 60' tow rope 4,100 lbs. of tensile strength Inflatable ball keeps rope above water Up to 4 riders"