The Topeak Modula Alloy Cage II features an innovative diameter adjustment system which allows you to adapt your cage to securely fit to a variety of bottles. It will fit to any bottle with a diameter of 63mm to 74mm, so it covers most cycling bottles and smaller minerals. Plus with the push of a button and a quick slide, you can change the bottle easily wherever you are.The Modula Bottle Cage is constructed from high-quality, engineering-grade plastic and aluminium, only the best materials and finish to give your bike's appearance the complement it deserves. It also has rubber pads on the corners of the alloy to prevent any annoying rattling when you're riding.Topeak Modula Alloy Cage II FeaturesMaterial: Aluminium/Engineering-Grade PlasticOuter Diameter: Fits 63mm-74mm BottlesSize (LxWxH): 8 ... More info