This item is a to a adapter. Manufactured with premium aluminum alloy material with anodised treatment for 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 bike tires. The adapter is suitable for most types of bicycles mountain bike, roadbike. Feature - ColorOrange - Material: Aluminum alloy - Size: About 1.5 x 1 x 1cm ( W x H) - Manufactured with premium aluminum alloy material with anodised treatment for durable and use. - Convert a to a valve. Also turn a UK into a US valve. - Should be used with a pump or compressor. Easy to install with smooth and standard thread. - Great sealing effect makes it well avoid leakage to extend the service life of bike tires. - Fit most types of bicycles mountain bike, roadbike. Package list: 4 x adapter