A. Features: - It is of good quality. - Made of aluminum alloy material, which is durable. - Suitable for bicycles with a tube diameter of 31.8 mm. - This rod - type extension bracket is made of qualified materials and is sturdy. - It is an extension mounting bracket for Garmin/-igs computers, sports cameras, and other accessories. - If you have any questions, please contact us. We will try our best to serve you. B. Specifications: - Material: Aluminum alloy - Colors: Black, blue, gray, red - Dimensions: As shown in the picture. C. Precautions: - Due to manual measurement, an error of 0 - 1 cm may occur. Please confirm that you don't mind this error before placing an order. - Due to differences between different monitors, the pictures may not accurately reflect the actual color of the item. Thank you for your understanding. D. Package contents: - 1 odometer handlebar extension piece.