PROPALM Gecko Bike Bottle Cage Bicycle Bracket Holder Anode Aluminum with Screws [Decoration]Unique design orginated from lizard, which surrounds your bottle and grips it to your bike [Meterial]High quality aluminum, light and strong, uneasy to crack or break; anodized surface prevents it from color fading and scratching [dimantions]11.5cm in length with inner diameter of 6cm, 5.8cm between two screw holes [special feature] Lizard eyes of rubber texture, which helps to grip your bottle firmly preventing it from rocking. [fitting part]This bottle cage comes with two hexagon socket cap screws that fit for most bikes.