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 preure 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,light blue Package includes: 4Pcs/Setx tire valve caps