You will receive 20 pieces of aluminum valve cap with O-ring rubber pad, sealing performance is good, enough to meet your different use and replacement needs on a variety of vehicles, is an essential auto parts in your life. Made of brass, chrome silver metal, strong, dustproof and more sturdy. Rubber Seals Inside - All wheel dust caps have rubber rings that won't leak during long and tough drives. Waterproof and dustproof: Our hexagonal dustproof cover is made of brass material with high tensile strength, good hardness and wear resistance, durable, corrosion resistant, waterproof and dustproof, which can help greatly extend the service life of the tire. Our brass tire valve covers with O-ring rubber pads do not leak during long hard driving, effectively insulate dust, dirt and road debris, effectively prevent possible leakage, well protect your tire valve and extend its service life The silver valve stem caps has a hexagonal design, which is easier to grasp and tighten on the valve, easy to install and remove, which can save you a lot of time and effort, convenient to use and remove Our valve stem caps are compatible with most vehicles and can be used in a wide range of cars, trucks, SUVs, RVs, motorcycles, bicycles and other vehicles to ensure stability and protection while driving