Union Jack Black ABS Tire Stem Valve Caps for MINI Cooper Made from high quality ABS plastic material in black finished. Design to fit any standard tire air valve. (please check if TPMS is on your car) Inner "O" ring seal insecure a clean valve orifice and consistent tire pressure. Fits all standard air valves. Knurled head for easy on and off installation. Sold as set of 4.