[No Drill Design]:Bicycle Water Bottle Cage Adapter Mount features a no drill design,eliminating the need to drill holes in your bike frame,thus protecting it from potential damage [Premium Material]:Bike Water Bottle Holder Bracket Adapter is made of lightweight and premium aluminum alloy,sturdy and long term use [Loop Shaped Connector Base]:The loop shaped connector base design of the Bicycle Water Bottle Cage Holder Adapter makes it suitable for most water bottle holders [Suitable For]:Bicycle Bottle Cage Adapter is suitable for most mountain bikes and road bikes with a diameter of 21-31.8mm/0.83inch-1.25inch [Package Includes]:Each package comes with 1 aluminum alloy Bicycle Water Bottle Cage Holder Adapter that can attachment of your water bottle holder on the bike frame