Description: Made of premium plastic, lightweight and durable. Can ruduce wind resistance and improve your vision. For handlebar diameter 31.8mm. Easily attach it to the handlebar to record your riding experience in a new way. Easy to install and use. Full compatible for GARMIN Edge series stopwatch. Fits on your bike handle bars to add extra storage space for your bike lights, headlight, speedometer, GPS or smartphone. Specification: Material: Plastic Color: Black Size(LxWxH): approx. 11x5.5x3.5cm / 4.3x2.2x1.4inch Fit for: 31.8mm diameter handlebar Suitable for Garmin 200/500/800.510.810.1000 Series Package Includes: 1 Piece Bike Computer/Camera Holder Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size.