Description: Ultra-thin and light, it can protect your bike tires from punctures. You can install it easily between the tube and tire to offer powerful puncture-proof protection. The tire liner provides physical barrier to block nails, thorns, glass and other debris. Made of polyurethane polymer composite material, which is durable and toughness. There are four sizes for your choice. They are suitable for mountain bike and bicycle. Item Name: Tire Liner Material: Polyurethane Polymer Composite Features: Puncture-proof, Wear-resistant, Lightweight Size Details: [Our Size 700C/20-25mm] Thickness: 0.5mm/0.02", Width: 25mm/0.98", Length: 212cm(Approx.) [Our Size 26"/1.5"] Thickness: 0.5mm/0.02", Width: 40mm/1.57", Length: 210cm(Approx.) [Our Size 27.5"/1.5"] Thickness: 0.5mm/0.02", Width: 40mm/1.57", Length: 223cm(Approx.) [Our Size 29"/1.5"] Thickness: 0.5mm/0.02", Width: 40mm/1.57", Length: 230cm(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 2 Rolls of Tire Liners Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.