WavePro Blade Towable Ski Tube (Blue, 56-Inch) Single rider towable ski tube. 56-Inch before inflation. Great tube for kids and adults. Heavy duty 30 gauge PVC with 840 denier polyester outer cover 4 nylon handles with EVA knuckle protectors. Boston Quick Valve for easy inflation and deflation PVC repair kit. Quick connect tow hook (rope NOT included)