1This stem top cap is made of qualified aluminum alloy, solid, firm and durable to use, ensures a long service time. 2You can mount this top cap on your bicycle stem, it can mount different type of computer, easy installation, convenient to use. 3Suitable for stem tube diameter about 28.6mm. 4Suitable for Cat Eye computer, for Garmin, viGPSPORT, Blackbird and Bryton. 5Great accessory for road bike and mountain bike. Features: This stem top cap is made of qualified aluminum alloy, solid, firm and durable to use, ensures a long service time. You can mount this top cap on your bicycle stem, it can mount different type of computer, easy installation, convenient to use. Suitable for stem tube diameter about 28.6mm. Suitable for Cat Eye computer, for Garmin, viGPSPORT, Blackbird and Bryton. Great accessory for road bike and mountain bike. Specifications: Condition: 100% Brand New and High Quality Material: Aluminum Alloy Suitable for Stem Tube Diameter: Approx. 28.6mm / 1.1inch Suitable for Garmin, viGPSPORT, Blackbird, Cat Eye, Bryton Weight: Approx. 45g Packing List: 1 x Stem Top Cap for Garmin 1 x Adapter for Cateye 1 x Adapter for Bryton 2 x Wrenches 1 x Long Screw