Our replacement innertubes are quite simply the strongest in the business. This is a Bladder Replacement for models like the Sportsstuff “Super Mable”and the Airhead “Pit Stop” 3 person towable tube BACKREST ONLY. If you need both the BACKREST and the SEAT BASE Replacement， please see our 3 Rider "Super Mable" Style 2 Piece Replacement Set. Please note the position of the inflation valve in the picture and ensure it is compatible with your backrest. You may need to fill via a flexible hose if your existing valve cover does not align properly! This contains the innertube only， and NOT the cover. Breathe new life into your towable! Don't spoil that summer vacation by having your favorite towable "fall flat"! Have an affordable spare with you on your well deserved time off! -Heavy Duty PVC Construction (12-15% thicker than any original or replacement tube on the market). -Double welded seams for added durability. -Super speed valve for easy inflation and deflation. -Measurements (Deflated) Approximately 72.5" Across the back and 30" Armrests If you have any questions on whether this innertube will fit your towable， we will be happy to assist and ensure it is compatible with your cover! Also available for the Airhead Big Mable and Sportsstuff Pit Stop 2 person size.

Our replacement innertubes are quite simply the strongest in the business. This is a Bladder Replacement for models like the Sportsstuff “Super Mable”and the Airhead “Pit Stop” 3 person towable tube BACKREST ONLY. If you need both the BACKREST and the SEAT BASE Replacement， please see our 3 Rider "S