1. Material: aluminum alloy + rubber ring 2. Specification: Presta to Schrader valves 3. Suitable for bicycles, road bicycles, folding bicycles and most mountain bikes 4. Lightweight and compact, easy to fit into your bag and portable 5. The material is strong and durable, not easy to corrode, can be used for a long time 6. Closely fit with rubber o-ring, can effectively prevent leakage and prolong the service life of bicycle tires 7. Easy to install, just use a wrench to put the cap on the tire valve stem
