1. Easy Access to Drinks: The cycling bottle holder adapter is used to adjust the water bottle cage's position, allowing you to place it in the most convenient location for easy access while riding. 2. Expandable: In addition to the water bottle cage, the bottle cage mount adapter can also accommodate an air pump or other devices. 3. Convenient and User-friendly: The bike bottle cage regulator features a simple yet practical design that allows for easy adjustment of the hole position by rotating or adjusting screws. You can easily install the water bottle rack in your desired location. 4. Design: Made from high-strength aluminum alloy materials to durability and lightness, improving comfort and speed while riding your bike. 5. Wide Applicability: The bike bottle cage mounting base works with different types of bikes, including mountain bikes, road bikes, folding bikes, etc. Whether you are a professional or a casual rider, it can provide convenience and utility to your cycling experience. Color:Black Material:Aluminum Alloy Package Contents: 1 x Cycling Bottle Holder Adapter With Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.