4pc Aluminium Valve Stem Caps, Tyre Valve Dust Caps Car, Motorbike, Trucks, Bicycle Prevent Air Leakage - Universal Tyre Function: Valve caps can protect valve against exposure to dirt and dust; prevent mud, dirt and rain water from your tire valve cores, also can replace the original bad valve cap of the tyre. Durable Material: The valve cap is made of good quality and durable aluminum alloy, dustproof and waterproof; with detailed stripe design, convenient to grip. Easy To Install: Dome shape and small, installation only need screws it onto tire valve stem; it is easy to install or remove when you want to check air pressure. Material: aluminum alloy Product size: 11mm Product color: black, gray, red, gold, blue, green. Applicable models: Universal Product features: 1. Made of pure aluminum alloy, with matte oxidation process, there is no rust and no fading 2. Good sealing, waterproof and dustproof, effectively prevent the valve mouth from being covered with clay and corroded 3. The surface is polished, smooth and burr-free, and the color is soft