4 X M5 x 12 SCREWS INCLUDED: The screws are standard size for water bottle mounts to most of bikes with DRILLED HOLES, and washers are suggested for tight fixing.
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.
Dimensions for water bottles that fit: 26 oz capacity, minimum diameter 2.75 inches, maximum diameter 3 inches. The cage securely holds the bottle in place with adjustable arms to prevent it from falling out while cycling.
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.