[Wear-resistant and durable] The bicycle inner tube is made of special TPU material Durability is also greatly improved compared to traditional rubber inner tubes In addition, TUP material is oil-resistant and waterproof, and has excellent load-bearing capacity and impact resistance. The tires generate low friction, allowing for maximum speed and performance Inflation precautions: When not installed in a tire, avoid over-inflation to prevent irreversible damage Before installation, please inflate with a small amount of air to check for leaks. Colour:As Shown Material:TPU Size:85MM Package Contents: 1 x Bicycle inner tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.