1.[Ultralight Full Carbon Fiber]Carbon bottle cages made of ultra-light, high strength, non-deformable, corrosion resistant carbon fiber material;Full Carbon Fiber Material - Incredible strong and lightweight(only 20±1.5g),Effectively reduce the weight for long-distance travelers; 2.[]Water bottle cage holder easy to install (2 bolts): installed on the bicycle frame in 1 minute (use a 4mm hex wrench (not included) Includes 2 bolts The bicycle frame requires threaded holes to install the bottle cage;Designed to secure bottle hold and easy bottle removal; 3.[Suitable For Bottles]The bottle cage is around 2.91 inches (74mm) in diameter,suitable for 74mm diameter of bottles (maximum diameter),water bottle too big or too small may not fit firmly; 4.[Stay Hydrated On The Ride]Quick and easy access to your bike water bottle when you need it.Recommend buying 2 bottle cages to keep you hydrated on super long rides so you can go further!Great for road bikes,mountain bikes,hybrid bikes, touring bikes and e-bikes.