Features 1、The stem cap is made of high quality aluminum alloy, anti-rust, sturdy, durable 2、Can be installed the top cap on your bicycle headset, it's compatible with many different types of computers, easy to install and easy to use 3、It is suitable for the diameter of the stem tube about 28.6 mm 4、Suitable for for Garmin, for Cat Eye, for Bryton, for Blackbird, for​ viGPSPORT 5、Great accessory for road bicycles and mountain bikes Feature: The stem cap is made of high quality aluminum alloy, anti-rust, sturdy, durable. Can be installed the top cap on your bicycle headset, it's compatible with many different types of computers, easy to install and easy to use. It is suitable for the diameter of the stem tube about 28.6 mm. Suitable for for Garmin, for Cat Eye, for Bryton, for Blackbird, for viGPSPORT. Great accessory for road bicycles and mountain bikes. Specification: Materials: aluminum alloy + plastic Color Options: Black, Red, Gold, Blue, Titanium Suitable Model: for Garmin, for Cat Eye, for Bryton Suitable for 28.6mm/1.1 inches in diameter on the front fork Meta Cap Size: Approx. 38mm / 1.5inch Mount Size: Approx. 35mm / 1.38inch Weight: 31g Package List: 1 x Bike Stem Odometer Holder 1 x Pack of Fittings Package List