Fits Most Standard Bottles: The aluminum water bottle holder for bikes is designed to be compatible with a wide range of standard bottles. Specifically, it can easily accommodate bottles ranging from 18 to 30 ounces (550 to 900 ml), including popular sizes like 20, 21, 22, 24, and 26 oz Durable Material: Corki bike bottle holder is built to last, crafted from aluminum alloy materials. Unlike plastic options, aluminum is resistant to rust and damage from the elements. The sturdy construction not only withstands daily wear and tear but also maintains a sleek appearance over time Secure Fit: One of the most important features of a good bike water bottle cage is how securely it holds your water bottle. Corki Cycles Aluminum bicycle bottle cages are designed to keep bottles firmly in place, preventing them from bouncing around or falling out during your rides Wide Compatibility: Corki Cycles mtb water bottle cage is designed for versatility and can be used with a wide range of bicycle models. Whether you own a road bike, mountain bike, hybrid bike, e-bike, gravel bikes, or even a touring bike, corki bike bottle cage fits all. Its universal design ensures compatibility with various frame types Easy Installation: The Corki Cycles bicycle water bottle holder comes with all the necessary tools including 1 Allen Key and 2 bolts. This user-friendly feature means you can set up your cage in minutes, without the need for complicated tools or professional assistance Stylish Appearance: With a variety of finishes and colors including Black, Silver, White and Pink available, you can easily match it to your bike's overall look. Corki Cycles aluminum mountain bike bottle cage complements both casual and high-end bikes, enhancing their aesthetic appeal Lightweight Construction: Weighing only 37 grams per pack, this aluminum bottle cage adds minimal weight to your bicycle while providing maximum functionality and durability for all your cycling adventures Bike Water Bottle Holders for Road, Mountain, MTB Bikes Material: Aluminum Alloy Color: Black Weight: 37g/1 Pack