1. KEEP ROLLING: prevent flat tires caused by valves that leak with Bike Bits Presta Valve Cores
2. EASY TO INSTALL: use pliers or valve removal tool to screw onto Presta Valve Stem
3. LIGHT, QUALITY: nickel plated brass cores
4. These valve cores is High-quality copper Nickel-plated valve cores.
5. Replaced the leak of the old valve make the tire rejuvenation.
6. Stop air leaks from old valves.
7. Compatible with Stan's, Vittoria, Continental, Kenda, Bontrager and more
12 Pack Presta Valve Cores
6 pcs Black Presta Valve Caps
6 pcs Red Presta Valve Caps