Features: Make of high strength aluminum alloy and plastic, enduring and long terms use. Well shaped slot, accurate to close fit adaption. Easy Installation: quickly release lock systems allows for quickly attachment and detachment of your devices. Bike computer bracket features a simple setup, making it a convenient accessory for cyclists. Enduring design ensures a secure hold for your devices during intense mountain biking. Specifications: Component: Plastic and Aluminum Alloy Type: B seat with screw wrench/A seat with screw wrench/A seat socket/B seat socket Size: As Shown in the Picture Package Includes: 1set Bicycles Speedometer Mount Bracket note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.