Feature:1. Butyl rubber inner tube has excellent air tightness, good resistance to cold and heat and aging resistance.2. It can be used normally for more than 100 days after inflating, and it is the most commonly used inner tube material.3. The butyl rubber tire inner tube can absorb the vibration of uneven roads, thus ensuring comfortable and safe driving.4. Simple installation, and the old tire inner tube can be easily replaced within a few minutes, which is timesaving and efficient.5. Equipped with a bent valve, it will never let your electric bicycle go flat with a replacement inner tube tire on hand.Specification:Item Type: Electric Bicycle Inner TubesMaterial: Butyl RubberProduct Color: As Pictures Shown Product Weight: Approx. 130g / 4.6ozGas Nozzle Type: Bent Angle Valve.Package List:1 xElectric Bicycle Inner Tube