Features1Butyl rubber inner tube has air tightness, good resistance to cold and heat and aging resistance. 2It can be used normally for more than 100 days after inflating, and it is the most commonly used inner tube material. 3The butyl rubber tire inner tube can absorb the vibration of uneven roads, thus ensuring comfortable and safe driving. 4Simple installation, and the old tire inner tube can be easily replaced within a few minutes, which is timesaving and efficient. 5Equipped with a bent valve, it will never let your electric bicycle go flat with a replacement inner tube tire on hand.SpecificationItem Type: Electric Bicycle Inner TubesMaterial: Butyl RubberProduct Color: As Pictures Shown Product Weight: Approx. 130g / 4.6ozGas Nozzle Type: Bent Angle ValvePackage List1 xElectricBicycle InnerTube