Quality Material: Bike Water Bottle Holder is made ofaluminum alloy material, sturdy.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.Feature: can be installed horizontally or vertically, suitable for round tube diameter 18~35mm/0.71in~1.38inEasy to Install: This alloy Bicycles Water Bottle Holder with screws fits on most bikes, 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, giving 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. Size Chart: 14cmx6.5cm/0.55inx0.26in Package Includes: 1 Bike Water Bottle Holder2 Screws1 Hexagonal Wrench Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.