A set of 2 adjustable mountain bike bottle cages, lightweight bike bottle holders

1.Suitable for most standard-sized water bottles: A 26-ounce bottle can fit tightly inside;The maximum bottle diameter is 3inch (762 millimeters)The arm of the bottle holder can wrap around the bottle securely, so you don't have to worry about it falling off while cycling2.Easy to install: Use a 3mm hex wrench (included) to secure the cage into the screw holes on the framePlease note - the bicycle frame needs threaded holes to install the cage3.Contains 4 Sets of Screws (M5x12mm): These screws are standard sizes, suitable for most bicycles with holes, used for installing bottle cages, such as road bikes, mountain bikes, BMX, fitness bikes, etc4.6061-T6Heat-treated aluminum alloySurface Hard Oxidation Treatment: Using high-quality materials and manufacturing processes to make it more durable and strong while remaining lightweight; each piece weighs about2Ounces (60Gram)