product details:<br /> <br />with installing screws， mount.<br />material: aluminum alloy<br />color: silver， black， blue<br />caliber: 2.1cm， fit for almost handlbar diameter:2cm-2.5cm<br />cupholder size: 8.5x6.5x14cm lxwxh<br /> <br /><br />features:<br /><br />100% <br />made of high quality aluminum alloy<br />useful for bikes which have no holder or inadequate for a frame holder<br />convenient to fetch drinka bottle holder<br />simple and practical design<br />small size and light weight<br />sturdy structure， prevent deformation damage<br />strongly-gripped hinge， fix the holder tightly<br />suitable for varied types of bikes， including mountain bike and folding bike<br /><br />package included:<br />1xbicycle aluminum alloy handlebar water bottle holder cages with adapter