Features:

Made of good flexibility PVC, environmental and non-toxic;
The gas nozzle part used advanced hot welding process, not easy to fall off;
Could easily prevent 95% of riding puncture!

Specification:

Brand: RISK
Material: PVC ( more elastic than nylon, more convenient to install)

Size: 

700c*18mm (Road bike/Fixed Gear)
26in*20mm (Mountain bike)
27.5in*20mm (Mountain bike)
29in*20mm (Mountain bike)

Packing: 

2pcs/bag RISK Tyre Liner Band

Function: use between the steel ring and the inner tube to prevent the banners puncture the inner tube, Could increase the tire pressure, lower the tire resistance, effectively prevent puncture.