Feature:1. Bicycle inner tube is made of high quality butyl rubber, better sealing performance, resistance, anti-aging, shock absorption and electrical insulation.2. High strength, good elasticity, not easy to break.3. Metal material, ultra-high airtight Schrader valve, increase its durability, ensures no inflation for 180 days.4. Suitable for mountain bike, children bike.5. 6 different types for you to choose, meet your different needs.Specification:Condition: 100% brand newItem type: Bike Inner TubeMaterial: butyl rubberColor: As picture shownOptional type: 26X1.75/2.125, 24X1.75/2.125, 22X1.75/2.125, 20X1.75/2.125, 18X1.75/2.125, 16X1.75/2.125Valve: Schrader ValveApplication: mountain bike, kid bikeProduct features: non-slip, super light Package List:2 xBike Inner Tube