SKI TUBE - This inflatable tube started the towable sport in 1979. It is the favorite tube at the annual waterski championships. There are many more tricks one can perform with this inflatable tube than any other water towable. Comes with special towing harness and 2 fluted handles (U.S. Patent Des. #418803). Made of extra heavy gauge pvc and designed higher in the front than in the back for more lift and buoyancy. Safety chamber.Note: Supplied with a repair kit and owner's manual. Warning and instructions printed on product. Quick Release QR2 is recommended. Model - U380/ST1000Diameter - 54. Weight - 7 lbs. Pers. Cap. - 1 only. 90 Day Warranty Made in China