Description Function: 1. Using butyl rubber material, it has excellent tightness, good cold and heat resistance and aging resistance. 2. The butyl rubber inner tube can absorb vibrations on uneven roads, thus ensuring a comfortable and safe ride. 3. Simple installation, and the old inner tube can be easily replaced in minutes, saving time and being efficient. 4. Equipped with a bent angle valve, it fits 16x2.50 inch electric bicycle tires insanely. 5. It will never allow your electric bike to flatten when you have a replacement inner tube on hand. Specification: Item Type: Electric Bicycle Tubes Material: Butyl rubber Product color: as shown in the pictures Product Weight: Approx. 264 g / 9,3 oz Gas Nozzle Type: Bent Angle Valve List of packages: 1 x Electric Bike Tube