Feature:1. Silicone case to protect your device for durability and longevity.2. Plastic durable mount for 31.8mm and 25.4mm diameter handlebar with two shims provided.3. Easily view your performance data on your computer in a perfect position.4. 1/4 turn twist for mount/dismount the case, easy installation.5. Compatible devices: for Polar M450 GPS bike computer. It is a really smart addition to your beloved bike computer!Specification:This set includes a computer mount that can be installed onto 31.8mm or 25.4mm handlebars with two shims provided and a silicone case to protect the bike computer. The silicone case is specially designed for GPS Polar M450 M460 and the mount is suitable for GPS Polar M450, V650 M460. it is a smart and perfect addition for your beloved bikes!Features: Silicone case to protect your device for durability and longevity.Plastic durable mount for 31.8mm and 25.4mm diameter handlebar with two shims provided.Easily view your performance data on your computer in a perfect position.1/4 turn twist for mount/dismount the case, easy installation.Compatible devices: for Polar M450 M460 GPS bike computer.It is a really smart addition to your beloved bike computer!Specifications:Material: Plastic & Silicone Compatibility: for GPS Polar M450 M460Suitable for: 31.8mm or 25.4mm handlebarsWeight 85.5g / 3.0oz Package size: 20 * 13 * 1cm / 7.9 * 5.1 * 0.4inPackage weight: 90g / 3.2oz Package List:1 * Bicycle Computer Mount 1 * Silicone Case2 * Shim 2 * Hex WrenchNoteThe computer displayed in photos is not included.Package List:1 * Bicycle Computer Mount 1 * Silicone Case2 * Shim 2 * Hex WrenchNoteThe computer displayed in photos is not included.