ITEM NAME:Aluminum Alloy Bike Bicycle Handlebar Seatpost Water Bottle Holder Stand Cage Aluminum Alloy Bike Bicycle Handlebar Seatpost Water Bottle Holder Stand Cage SKU: Y0015526206134609 Everyone is a moon and has a dark side which he never shows to anybody..CNC aluminum alloy clamp + plastic base. Fixed Clamp Size: 6 4.7 1.2 cm. 1 x Water Bottle Holder Adapter. Material: Aluminum Alloy + Plastic. Easily install, the fixed clam can be installed in two angles.