The stem mount is designed for Polar M450 V650 GPS computer,1-1/8 34; diameter 5mm height stem mount, it cantightly attached to your bike. Made of CNC-machined aluminum,durable and strong, ideal for mountain bikers.Features:Designed for Polar M450 V650 GPS computer.1-1/8 34; diameter 5mm height stem mount, tightly attached to your bike.You can adjust the angle of the mount, easy to use.Made of CNC-machined aluminum, durable and strong enough.Specifications:Material: CNC Aluminum 43; PlasticCompatibility: for Polar M450 and V650 Item Size: 8.5 * 3.6 * 1.4cm / 3.35 * 1.41 * 0.55inItem Weight: 26g / 0.92ozPackage Size: 10 * 8 * 1.5cm / 3.94 * 3.15 * 0.59inPackage Weight: 65g / 2.3ozPackage List:1 * Stem Mount2 * Hexagon Wrench1 * Hexagon ScrewNote:Bike computers are NOT included.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it