Durable Material: Made of aluminum, can be used for a long time, but in order to avoid ionization and fusion of the valve and the valve core cap, please remove the cap and reinstall it every month. Universal Dimensions: The tire valve stem diameter is approximately 1 cm and 1.6 cm high and is suitable for most tires. Protect Your Valve Core: Dust-proof tire valve cap completely sealed, prevents water, dust, or sand from entering the tire to Increase the life of the tire. Widely used: The valve core is a universal valve core that can be used in most automobiles, bicycles, and motorcycles. Save and Convenient: Package includes 20 valve core caps, buy once, use many times.