This item is a cap. Manufactured with premium copper material which durable and use. It is designed with smooth and standard thread for easy twisting and installation. Great sealing effect makes it well avoid leakage to extend the service life of the tires. The adapter is suitable for most types of bicycles, , car, auto and etc. Features - Color: As shown. - Material: Copper. - Size: 1.1x0.9x0.9cm. - Application: the stem caps are applied to protect tire valves so that extend their serving life. - Install easily: you just need it on your tire stem, easy and convenient to operate. - fit: the stem caps can be equipped on , auto cars, trucks, motorcycles, bicycles and most vehicles. - Durable material: the stem caps are made of quality brass and the surface is plated, durable and anti-corrosive, ensure long time of usage. - Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package list: 20 x Caps