(4 Count) Cool and Custom &ldquo;Hexagon Rhinestone Top with Easy Grip Shape&rdquo; Tire Wheel Rim Air Valve Stem Dust Cap Seal Made of Genuine Anodized Chrome Metal {Silver & Gold Colors} "Anti Theft Locking" WARRANTY: This product comes with a lifetime warranty that is guaranteed by the manufacturer. COMPATIBILITY: This product is compatible with almost any automobile, truck, SUV, RV, ATV, UTV, motorcycle and bicycle. MATERIALS: This product is made of only the highest quality materials available. No parts of this product are made of toxic or hazardous materials. The businesses this products materials are sourced from are properly vetted by their local governments to ensure that they comply with all labor laws. These valve caps are made in Japan and stored in American facilities. IMPORTANT FEATURES: These valve cap have hard metal internal threads for easy application. They are also rust proof. THINGS TO CONSIDER: High-speed pressure loss and core contamination are several of the reasons why valve caps should always be used. In case anything disrupts the valve core's seal, the valve cap provides a backup seal that prevents air from escaping. And while using valve caps will make it take longer to check tire pressures, the consequence of having a tire lose pressure is much worse. Three types of valve caps are available: plastic dome, metal dome or a metal "screwdriver" design used to tighten and loosen valve cores. The plastic dome caps are fine for normal driving and autocrossing, however they should be replaced with metal valve caps to withstand the high temperatures experienced during racetrack driving or long distance drives. Valve caps are knurled to make it easier to tighten or loosen them, while some metal caps feature hex head designs. Metal caps use a rubber washer or o-ring to seal the valve completely. If the valve cap is missing, it is best to press the valve core momentarily to release a little air before checking or adding air pressure. This will allow the compressed air inside the tire to blow debris out of the valve. Avoiding moisture is more difficult to address, because it is often hard to find a consistent source of dry air. Checking or adding tire inflation pressure outside in the middle of a snowstorm is not recommended unless absolutely necessary.