Made of high-quality aluminum alloy, it has smooth surface, and is rust-proof and durable.Comes with two protective gaskets to fit your bike and make it stable and strong.Suitable for bicycles with a handlebar diameter of 19-40mm.This bracket can be rotated 360 degrees to adapt to the installation position, and is easy to install and remove.The bicycle bottle cage adapter is perfect for the most common bottle cages on the market.Item Name: Bicycle Bottle Cage AdapterMaterial: Aluminum AlloyFeatures: Easy to Install, Rust-Proof, Durable, SableSize: 8.3cm x 5.5cm x 1.6cm/3.27" x 2.17" x 0.63" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bicycle Bottle Cage Adapter2 x Gaskets1 x Screw Wrench