Rust-proof Material: The striped grip design of the Presta valve adapter is non-slip and easy to install, suitable for various types of bicycles, ensuring a long service life. The Presta valve adapter is made of brass, good rust-proof. Leak Prevention: Connect the Presta valve adaptor tightly with the Presta valve, and an O-ring rubber is installed at one end of the adapter to prevent air leakage during use. Versatile: This Presta valve adapter can convert Presta valves to Schrader valves or other universal valve interfaces, giving you more valve options to match floor pumps, mini pumps, and even air compressors. It can be used on bicycles, racing cars, motorcycles, cars, and trucks. Small size: The Presta valve adaptor is packaged in a palm-sized pack, you can put it in your bike bag or car to help you deal with the mismatched air pump in an emergency.