Thank you for coming to our shop, I hope it is to your satisfaction Item Name: Conversion Seat Style: B: for Bryton, G: for Garmin, W: for Wahoo (Optional) Compatible Models: for Wahoo/for Garmin/for Bryton Features: High Strength, Lightweight, Wide Compatibility Size Details: Diameter: 3.4cm/1.34" (Approx.) Specifications: Equipped with 2 M3 screws mounting accessories, this stopwatch conversion seat is easy for you to install. The product is compatible for Wahoo/for Garmin/for Bryton. Stopwatch conversion seat is a perfect replacement part for various bicycles as it is characterized by high strength, easy installation and wide compatibility. It is constructed of ABS material. The diameter of the product is 34mm. Kindly Remind: Due to light and display, there may be slight differences between the picture and the actual color of the product. The color is subject to the goods received. In addition, please allow slight size difference due to manual measurement. High quality, assured choice is guaranteed Package Includes: 1 x Conversion Seat 2 x M3 Screws