Our tire inserts are designed to protect your bicycle tires from punctures. Mounts easily between inner tube and tire, providing effective puncture protection. One package contains two parts for one front and rear tire of the bicycle. You are worth it. 1. Made of high-quality material that is durable and sturdy. 2. Designed to protect bicycle tires from punctures. 3. Easily installs between the tube and the tire for effective puncture protection. 4. High tensile strength and easy installation. 5. Provides a physical barrier against nails, thorns, and other debris. Material: Polyurethane polymer Color: Clear (As Pictures Shown) Package weight: approx. 72-116g Options type: 700C, 26 ", 27.5", 29 " Size (T x W): 0.5 x 25mm / 0.019 "x 0.98", suitable for 700c road bike; 0.5 x 40mm / 0.019 "x 1.57", suitable for 26 "bicycle, tire width requirement 1.5" -2.1 "; 0.5 x 40mm / 0.019 "x 1.57", suitable for 27.5 "bicycle, tire width requirement 1.5" -2.1 "; 0.5 x 40mm / 0.019 "x 1.57", suitable for 29 "bicycle, tire width requirement 1.5" -2.1 " Length: approx. 2.13m / 6.98ft (700C) 2.07 m / 6.79 ft (suit for 26 "bike) 2.24 m / 7.34 ft (27.5 inch bike suit) 2.26 m / 7.41 ft (29 "bike suit) Quantity: 2 pcs The package includes: 2 pcs. tire inserts Note: It is not 100% puncture proof.