[Hold Tight] Corki water bottle holder for bike has a secure and sturdy hold that will ensure that the bottle stays firmly in its place even when riding fast or on bumpy trails. [Less Scratch]The corki composite bike bottle holder provide easy use and are less likely to scratch the finish on most water bottles. [Durable & Highly Resilient] Corki bicycle water bottle holder is made of polycarbonate and glass fibre-reinforced ensure it's light and highly resilient, making it perfect for road or trail applications. [Suitable for Most Bike Bottle] Bike water bottle cages arm that wrap around bottle fits most standard & over sized bike water bottles, including 20, 21, 24, 25 & 33 oz / ounces (500, 550, 650, 750 & 951 ml sizes). [Easy to Install] Bike bottle cage is easy to install and comes with 3 screws per bottle cage that will give it a firm hold against the threaded holes on your bike’s frame.