4 M5 x 12 screws come included: These screws are the typical size for attaching water bottle mounts to bikes that have pre-drilled holes. We recommend using washers for secure fastening.
EASY INSTALLATION: Use a 4mm hex key (included) to fasten cages in screw holes on frame. PLEASE NOTE - bike frame requires threaded holes for installation of cages.
Back up from USHAKE : These Bike Water Bottle Holders are designed to be used for long term, if there is any issues about the product, please inform us and we will follow up closely.
6061-T6 HEAT-TREATED ALUMINIUM ALLOY: High quality material and manufacturing process for extra strength and durability combined with low weight, 2.1 oz (61g) each. FIT FOR PLASTIC WATER BOTTLES. ATTETION: ALUMINUM WATER BOTTLE MAY BE SCRATCHED ON SURFACE.
WATER BOTTLES FIT: 26 OZ water bottle can fit snugly; min bottle diameter is 2.75inch(68.9mm) max bottle diameter is 3inch(76.2mm). The water bottle cage has arms (adjustable) that wrap around the bottle for a secure and firm hold so you don't have to worry about it falling out during your ride.