Size:VW-R Features: 1, High quality sealing ring inside the valve caps, to prevent the flat tire. 2, Specially designed to replace the plastic caps. Easy to install and safe to use 3, Dust proof: To ensure stable tire pressure by protecting the valve core from corrosion due to direct contact with clay, water and snow. How to maintain the valve caps? To avoid the valve caps’ natural oxidation and corrosion, we should maintain the valve caps with the following methods. 1, Avoid long time exposure of the valve caps to water or snow. 2, To unscrew and clean the valve caps, and to check the tire pressure on a regular basis, say 2-4 weeks/once, so as to prevent the oxidation of the valve cap threads and ensure the tire pressure normal. Package: 4pcs/package 
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