Features： 1、This stem top cap is made of qualified aluminum alloy, solid, firm and durable to use, ensures a long service time. 2、You can mount this top cap on your bicycle stem, it can mount different type of computer, easy installation, convenient to use. 3、Suitable for stem tube diameter about 28.6mm. 4、Two options for choosing, for Cat Eye computer or for Garmin, viGPSPORT, Blackbird, such as for Garmin 1000, 820, 810, 800, 520, 510, 500, 200. 5、Great accessory for road bike and mountain bike. Specification： 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. Great accessory for road bike and mountain bike. Specifications: and High Quality Material: Aluminum Alloy Color: Black Suitable for Stem Tube Diameter: Approx. 28.6mm / 1.1inch for Garmin suitable for Garmin, viGPSPORT, Blackbird, such as for Garmin 1000, 820, 810, 800, 520, 510, 500, 200 for Cat Eye suitable for Cat Eye Computer Weight: Approx. 21g Packing List: 1 x Stem Top Cap Package List：