Specifications: Product name: anti-theft tyre valve cap Material: stainless steel. Quantity: 4 pieces. Weight: 40g Care instructions: 1. The valve stems cover features with a rubber seal inside, so not only prevents leakage, but also prevents water, snow and dust from entering the tyre, thus prolonging the life of the tyre. 2. These air valve caps have been equipped with an anti-theft key design, which can lock the valve caps firmly and is not easy to steal. 3. Valve caps can protect the valve from dirt and dust; can also replace the original defective valve cap of the tyre. Tips: 1. A hex key is required to remove the tyre valve cap. So try not to lose the included hex key. 2. Please allow for slight size errors due to manual measurement. 3. Please allow slight colour differences due to different monitors.