About this itemAlloy Material: The valve cover is made of high-quality alloy material, which has good compression, bending and impact resistance. This enables the valve core cap to withstand mechanical loads under high pressure, high temperature and high-speed movement.Anti-theft Design: After installing the valve core cap, you can use the free hexagonal wrench to reinforce the product, which can effectively prevent others from stealing or replacing the valve cap, so as to increase the safety of the tire and avoid unnecessary losses.Built-in Seal: This valve cap features an O-ring rubber seal inside to keep it airtight. The O-ring rubber sealing ring has good sealing performance and durability, which can effectively prevent the leakage of tire pressure and ensure the stability and durability of tire inflation.Installation Steps: Rotate and unscrew the original nut, and clean the valve core. Align the valve core and slowly screw on the valve cap, and use a wrench to reinforce it to prevent theft.Product Specifications: The size of this product is 0.39" x 0.51", and the inner diameter is 0.37". You will receive four silver valve core caps, one L-shaped hex wrench, if you have any questions about product use, please feel free to contact us.