Feature: 1. Sturdy and durable: these wheel air valve covers are made of Aluminum alloy, hard and durable, the shape is not easy to change even if it gets pressure. 2. Sealed shape: the valve stems covers features with rubber o-ring seal inner, so it can not only help prevent leakage, but also can prevent water, snow, and dust from coming into the tire, thus prolong the tires service life 3. Wide application: this set of wheel air valve covers fits for many kinds of vehicles with American valves caps, such as cars, trucks, motorcycles, bicycles, electromobile, etc. 4. Size: diameter is 1.1 cm, height is 1.6 cm, can fit your tires well with complete o-ring seal, dustproof and waterproof . 5. Knurling design can provide a good grip for screwing them on and off. Easy to install or remove when you want to check air pressure. Easy to install and remove: Just screws onto tire valve stem, they can be installed without any tools. They are easy to remove. This car tire aluminum alloy valve cap is extremely durable and sturdy, anodized to prevent corrosion, light weight, suitable for most vehicles. Specifications: Size(L*W): 1.6*1.1cm/0.63*0.43inch Weight: 10.3g Material: Aluminum alloy Color: black/gray/blue/red Applicable models: for universal cars Installation way: knobbing Package includes: 4Pcs x tire valve caps