Features: 1. Made of quality glue materials, which is durable and elastic, can help protect from flats due to punctures. 2. Used to seal the inner hole of the rim and maintain the airtightness of the tire under high pressure. 3. Installed between bicycle tube and rim, protect tube from pierce by spoke or friction during trip. 4. Comes in rolls for 2 mountain bikes or 1 road bike. Each measures about 10m long. 5. Suitable for most road bike, mountain bikes, track bike, etc. Upgrade your bike and bring a better experience. Note: For mountain bike, inner rim width + (2~4) mm, or the outer width of the rim is about -2mm, 23/25mm tire pads are mostly used. Road bikes generally use 18mm tire pads for 23mm outer rim width, and 21mm tire pads for 25mm outer rim width. For road bikes in smaller wheels, 16mm tire pads are used for reference. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measure