Feature: Ultra-light, puncture-proof and explosion-proof. Protect your inner tube and prolong the life of your tire. Made of high-quality materials, it is and strong in pressure resistance. It is a shield that prevents tires from being punctured by brambles, glass and road debris or other thorns. Specification: Product Name: Bicycle high pressure anti-puncture tire pad Material: PVC (stretchable, elastic enough) model: Mountain bike (24*20mm or 26*20mm; 27.5*18mm 29*20mm) Road car, dead speed car (700C*18mm) Folding bikes,, etc. (20*18mm; 22 (451mm)*18mm) color: red Function: Used between the steel ring and the inner tube to prevent the spoke from piercing the inner tube; It can make the tire pressure higher, the tire resistance smaller, and more effectively prevent tire blowouts. Package Included: 2pc bicycle inner tube liner Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Made from high-quality materials, our outdoor sports products are durable and affordable to meet your daily needs. Please check the product size and model before placing an order to ensure it is the product you need. When you encounter a problem, please contact us and we will help until the problem is perfectly solved. When you receive your product, whether you are satisfied or not, we want to hear your opinion. Every customer can enjoy free refund or exchange service for damaged/quality problem products.