Description: 【Material】: Bike Water Bottle Holder is made of carbon fiber, which is lighter than aluminum alloy, wear resistant, reliable, high strength, not easy to deform, and can be used long time 【Lightweight Portable】: The Water Bottle Cage for Mountain Bike, simple and practical, is lightweight and compact in size. The kettle rack is installed on the frame, and placing the kettle on the frame is suitable for most bikes 【Retention System】: The water bottle cage with reliable construction no matter whether riding on the road rough terrain, can hold the bottle tightly, will not sway and fall off, and will not deform or break when encountering strong impact 【Easy to Install】: This Bicycles Water Bottle Holder fits bottles with diameter of approximately 72 to 75mm, is weatherproof, waterproof to use, can easily and quickly mount to your bike frame, and is convenient to take out 【Widly Used】: The water bottle holder wraps the bottle securely, quick and easy access to your bike water bottle when you need it. Great for road bikes, mountain bikes, hybrid bikes, touring bikes, and folding bikes Specification: Material: Carbon Fiber Size Chart: 14.5cmx7.4cmx7.6cm/5.71inchx2.91inchx2.99inch Package Includes: 1 Bike Water Bottle Holder 2 Screws Note: Please allow slightly errors 1-2cm differences due to manual measurement.