The OBrien lowrider 3 towable tube is 35% thinner than the popular super screamer, keeping you closer to the water for more action. Plus the extra low profile allows easier boarding and more stability while riding. Softec technology allows the most comfortable ride without abrasions. Constructed of 30-gauge PVC and covered in 840-denier nylon for durability. Also features Lightning Valve for easy and quick inflation/deflation, quick-connect tow hook, and easy-to-grab handles with EVA knuckle guards. 510-Lb. Capacity. 80 inch diameter. The Lightning Valve is similar to the boston Valve except that it is attached to the towable, so there are no parts to keep up with or lose. The wider opening inflates and deflates 57% faster than the boston Valve. An interior flap prevents air from escaping, even if the cap is not in place. INSIDE diameter of the Valve measures 30mm.