Bling Anti-Theft Locking System BLUE-D Diamond Rhinestone Metal Chrome Tire Rim Valve Stem Cap Universal Fit For All Vehicles(Car, Truck, Bike). Elegant and Special Designed. Anti-Theft Locking System. "O" ring is inside already. Tire Valve Stem Caps made from high quality copper. Sold as a set of 4 Valve Caps in one case.