Feature: 1. Note: please replace these aluminum wheel air valve covers monthly to avoid unwanted oxidation and adhesion due to direct sunlight 2. Sturdy and durable: these wheel air valve covers are made of aluminium alloy, hard and durable, the shape is not easy to change even if it gets pressure 3. Sealed shape: the valve stems covers are complete o-ring seal, so it can prevent water, snow, and dust from coming into the tire, thus prolong the tires service life 4. 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. 5. Size: diameter is 1.1 cm, height is 1.7 cm, can fit your tires well with complete o-ring seal, dustproof and waterproof . Sealed shape: The valve stems covers are complete o-ring seal, so it can prevent water, snow, and dust from coming into the tire, thus prolong the tires service life. 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. Specifications: Size (LWH): 1.1 x 1.1 x 1.7 cm/ 0.43 x 0.43 x 0.67 inch Material: aluminium Colors: silver, black, red, gold, blue, gray, purple, orange, green Package includes: 4Pcs/Set x tire valve caps Please Note: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Picture just as a reference.the actual delivered goods shall prevail! 2. Please allow 2-3 mm deviation exists due to the different measuring way Thanks for your understanding :)