Ensuring you are Ready for the Road Ahead , the X-tra Seal Tire Valve Stem Cap is made from high-quality materials, including plastic, metal, and rubber. It is designed to withstand wear and tear while providing a secure fit over the valve stem. With their small and compact size, this tire valve stem cap is perfect for any tire type and size. The caps have threads on the inside for allowance of being easily screwed onto the valve stem. This replacement cover provides a tight seal that prevents air leakage and debris from entering the tire. This tire valve stem cap is the ultimate tire accessory ensuring your vehicle's tires are well-protected. FleetPride is your First Click in Heavy Duty .