MATERIAL:Valve stem caps are made of TPR and glow-in-the-dark. tire caps are not only practical valve covers, but also fun for your friends Size: mini tire cover shaft length 0.5 inches, length 1.57 inches, width 1.18 inches TIRE VALVE CAPS: Valve stem caps are fun and eye-catching, they are the center of your attention. tire caps can also be used as a small gift for your friends, let them feel your humor talent WIDELY APPLICABLE: Funny tire caps can be screwed onto many styles of tire caps. tire caps are universal and fit a wide range of cars, trucks, bicycles and motorcycles Functional protection: Light-up tire caps protect tires from water, dust or sand, prevent air leakage and ensure driving safety