[ ABS Plastic & Anti-Rust ] - The material of the caps is ABS plastic, coated with polymerclay, Anti-Rust can effectively prevent the valve from being covered with dust/snow/rainwater, extend the life of the tire. [ Rotating Thread & Anti-Leakage ] - The inside of the cap is rotating thread structure, it can fastened tightly with tire stem, effectively preventing the valve from leaking. [ Universal Fits & Easy To Install ] - The size of the cap is 0.74inch* 0.59inch/ 19*15mm(H*W). It is universal fits for standard American (Schrader) valves. You can install it no need any extra tools, very easy and convenient. Our car valve caps are Made of Sparkling Rhinestones, Universal Size for Cars, Trucks, SUV , Bikes. [ Handmade Sparkling Rhinestones ] - Our tire caps are made of Sparkling Rhinestones material, give your car a unique LUXURY look. It?s also a perfect gift for your families and friends.