Feature:1. Made of butyl rubber material, it has better air tightness, heat resistance and durability.2. The butyl rubber tire inner tube can absorb the vibration of uneven roads, thus ensuring comfortable and safe driving.3. Simple installation, and the old tire inner tube can be easily replaced within a few minutes, which is timesaving and efficient.4. Electric Bicycle replacement inner tubes are suitable for most electric bicycle bikes.5. The tube is equipped with an Bent valve, never let your bike go flat with a replacement bike inner tube tire on hand.Specification:Item Type: Bicycle Inner TubesMaterial: Butyl RubberProduct Color: As Pictures Shown Product Weight: Approx. 146g / 5.2oz.Package List:1 x Bicycle Inner Tubes