Features: brand new and high quality Made of premium aluminum alloy materials, durable. for bicycles with a pipe diameter of 31.8mm. This rod extension mount is made of qualified material, solid, firm and durable to use. It is an extension mount bracket for garmin/-igs computer and sports camera and other accessories. Contact us if you have questions,we will try to serve for you until you are satisfied. Specifications: Material:Aluminum Alloy Color: Black Blue for Grey Red Size:as Picture Shows Note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Odometer Handlebar Extension.