This Bontrager butyl rubber inner tube is designed for road and gravel bikes with a wheel size of 28 inches. It features a Presta valve with a length of 80 mm and weighs 6 oz. The tube size is suitable for 28-32c tires and comes in black color. The item includes one inner tube with a valve and is made of rubber material. The model number is 513799 and it is categorized under Sporting Goods, Cycling, Bicycle Tires, Tubes & Wheels, and Tubes.