Cyclists benefit from stable bottle cage mounting provided by this rustproof adapter suitable for mountain bikes, road bikes, leisure bikes, and folding bikes. Its double-bracket design ensures secure installation, allowing riders to pay attention to their trip while feasting convenient access to their water bottles. Specification: Product name: Bottle Cage Adapter, Product material: Main body aluminum alloy + screws stainless steel, Product size: about 10x13.47cm/3.94x5.3 inches, Net weight: 101.7g, Wrench: M4. Product List: 1 * Bottle Cage Adapter. Notes: Due to different lighting and screen settings, the product color may be slightly different from the picture. Due to the difference in manual measurement, please allow a 1-3cm difference in size. Excellent Stability Feature: The adapter's stable construction keeps the bottle cage firmly attached to the frame, avoiding displacement and ensuring consistent safety and stability. Double Bracket Design: Ensure sufficient installation space with a double bracket design that expands two water bottle bracket positions for versatile mounting options at your bike or gear. Sturdy and Strong: The adapter's excellent aluminum alloy composition ensures long-lasting usability, maintaining its sturdy form even after prolonged periods of application. Wide Range of Uses: Designed to accommodate various tube diameters, this adapter suits leisure, mountain, road, and folding bikes, offering compatibility across multiple bike types for broad usability. Convenient Setup: Position the bracket in the frame hole and mount the bottle cage effortlessly to achieve a dependable connection with minimal time and energy required.