Feature: 1. Manufacturing Material: Made of high quality metal and rubber material, beautiful appearance and strong sealing. 2. Product Size: The length of vacuum valve of electric scooter is about 2cm / 0.8in, which is convenient to use. The vacuum valve of electric scooter is suitable for aperture less than 9mm / 0.4in or so. 3. Applicability: In addition, it is suitable for electric scooter and bicycle vacuum tire straight stem. 4. Diverse Features: What's more, it is lightweight, easy to use, durable and has fine workmanship. 5. Simple Operation: Simple to operate, easy to use, easy to install and disassemble. Specification: Item Type: Electric Scooter Vacuum Valve Weight: Approx.7g / 0.2oz Material: Rubber + Metal Length of Vacuum Valve: Approx.2cm / 0.8in Applicable Aperture: less than 9mm / 0.4in or so Package List: 1 x Vacuum Tire Nozzle