Specifications:The material is soft and will shrink automatically with the pressure, without hurting the inner tube.They have super toughness, elasticity, can resist glass, crushed stone, play an explosion-proof effect.These products are ultra-light and ultra-thin, does not increase the burden of riding.Installation steps:1. Use a tire lever to remove one side of the tire, and the other side does not need to be removed.2. Round the puncture-proof tire pad smoothly along the inner tube.3. After the round, reduce the excess part Connecting.4. Slowly pump up the tire after putting in the tire pad. If there is a tire pad deviation during the inflating process, adjust it in time.Type: Tire LinerMaterial: Polyurethane Polymer CompositesFeatures: Anti-Puncture, Durable, Easy to Install, Bike Tire ProtectorSize Details[Our Size 700C] Thickness: 0.5mm/0.02", Width: 25mm/0.98", Suitable for 700C 18-25mm (Approx.)Package Includes:2 x Tire Liners