The stem mount is designed for Polar M450 and V650 GPS computers. With a 1-1/8 inch diameter and 5mm height, the stem mount securely attaches to your bike. Made of CNC-machined aluminum, it is durable and strong, ideal for mountain biking. You can adjust the angle of the mount for easy viewing and use. Features: - Compatible with Polar M450 and V650 GPS computers - 1-1/8 inch diameter, 5mm height stem mount for secure fit - Adjustable angle for optimal positioning - Constructed from CNC-machined aluminum for durability Specifications: - Material: CNC Aluminum and Plastic - Compatibility: Polar M450 and V650 - Item Size: 8.5 x 3.6 x 1.4 cm / 3.35 x 1.41 x 0.55 in - Item Weight: 26g / 0.92 oz - Package Size: 10 x 8 x 1.5 cm / 3.94 x 3.15 x 0.59 in - Package Weight: 65g / 2.3 oz Package List: - 1 x Stem Mount - 2 x Hexagon Wrench - 1 x Hexagon Screw Note: Bike computers are not included.