Owing to the fashionable appearance, our product looks exquisite. It is light in weight so that it will bring you to the comfortable riding experience. The surface is treated with anodic oxidation and the color is bright. Featuring with a variety of installation methods to meet your different needs. At the same time, it can reduce the pressure on the back and let you say goodbye to backaches. It is made from aluminum alloy, is durable and wearable to use. There is one size of the product to choose from. The inner diameter of the front fork tube is between 24.6-25.4MM, and the inner diameter is small and cannot be installed. The inner diameter is large and the fixed is unstable. Be sure to measure the inner diameter. Item Name: Bike Stem Riser Material: Aluminum Alloy Features: Reusable, Portable, Stability Color: Black Increase Range: about 3-50MM Size Details: Screw Length: 118mm/4.65" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bike Stem Riser