These are brand new Metal Dome Tire Valve Caps - Brass Alloy - 20 Pack. They are made to fit any Schrader valve stem (Universal), they fit on all vehicles. These metal dome valve caps have an internal neoprene o-ring to protect your valve stem. The metal dome tire valve caps are made of brass alloy and nickel coated. Valve caps are rustproof. These metal dome valve caps are easy to install and look great on any wheel. Size is 9mm in diameter and 12mm in height. Valve caps are rustproof. These metal dome valve caps are easy to install and look great on any wheel. Great tire valve caps for tough environments.