Rubber Seal: These tire valve caps with rubber O ring inside, prevent air leakage, and feature an enhanced airtight seal that creates a tighter, more effective seal.||Specification: Dimension: 1.5x1.4cm / 0.59"x0.55"(L*W), Hole Diameter: 7mm/0.28" ||Material: The tire valve caps are dustproof and waterproof, can prevent water, dust, sand, or something else from coming into the tire, and prolong the tire service life.||Easy Installation: No other tools are required, convenient to grab and tighten.||Fitment: Universal fit for auto, cars, trucks, motorcycles, bicycle valve stem cap.