[Custom Your Own Mount] Kaedia offers a variety of mounting parts. Find your ideal mount and enjoy customizing your vehicle. Ball: Size: 1.0 inches (25.4 mm), 1 inch (1 cm); Material: Hard resin, aluminum alloy; Kaedear worry-free after-sales service: Kaedear is committed to customer satisfaction. With a one-year worry-free warranty, we will quickly and responsibly responsibly responsibly even after installation. Easily access the compensation application form through the QR code in the product description. We can also support email and phone calls. If you have any other questions, please feel free to contact us. We have eligible staff to consult the installation of the bike and can answer your expertise. The Japanese staff will treat your relatives with the heart of hospitality.