Material of manufacture: Made of high quality metal and rubber material, good appearance and strong hold. Product size: The length of the vacuum valve of the electric scooter is about 2 cm / 0.8 inches, which is convenient to use. The vacuum valve of the electric scooter is suitable for opening less than 9 mm / 0.4 inches. Applicability: In addition, it is suitable for electric scooters and vacuum tires for with straight stem. Different features: it is lightweight, easy to use, durable and fine workmanship. Simple operation: simple to use, easy to use, easy to install and disassemble., Manufacturer: Shanrya