Features1Using butyl rubber material, it has air tightness, good resistance to cold and heat, and aging resistance. 2The butyl rubber tire inner tube can absorb the vibration of uneven roads, thus ensuring comfortable and safe driving. 3Simple installation, and the old tire inner tube can be easily replaced within a few minutes, which is timesaving and efficient. 4Equipped with a bent angle valve, it wildly fit for 16x2.50inch electric bicycle tires. 5It 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. 264g / 9.3ozGas Nozzle Type: Bent Angle ValvePackage List1 x ElectricBicycle InnerTube