Titanium Bike Bottle Cage, Drink Holder for Outdoor Activities, Accessories About This Item 【Water Bottles 【Fit】: 23/24/25/26/27/28 OZ water bottles can fit perfectly, other bottles like 30oz, if the bottle is big, then yes. Precisely, it is decided the diameter of the bottle, 【Minimum bottle diameter】: is 2.75 inches (68.9mm), maximum bottle diameter is 3 inches (76.2mm). The cage designed to flex enough to insert and hold the standard water bottle securely, you can bend down to clamp the bottle. 【Standard Size】: 2 screws included, it's 56mm-71mm range for mounting screw distance, don't worry, it's standard size, suitable for different brands of bikes. < p>【High quality】: Made of aluminum alloy, rust-proof, extra strength and durability combined with low weight. 【Easy installation】: Use a hex key of 4mm (not included) to fix cages in screw holes on the frame. Note: The bike frame requires threaded holes for installing the cages. 【Flexible Design】: The water bottle holder has arms