Features: Materials: Bicycle bottle cages are made of high-quality plastic so they can withstand any bumps and endless beautiful journeys on the road. Universal Bike Cup Holder: Lightweight bicycle bottle cage is designed to fit most brands of bicycle water bottles.Attach both cages to the bicycle to maximize moisture retention. Performance: The built-in screw design can ensure stable placement without affecting displacement super toughness and will not deform or break when encountering a strong impact. Easy Access: The optimized side-load shape makes it easy to access your bottles in even the most compact road and mountain bike frames. Easy To Install: Use a hexagon wrench to fix the cage in the screw holes on the frame. Please note the bicycle bottle cage needs to use threaded holes to install the cage. Specifications: Material: Polycarbonate + glass carbon fiber Process: Double surface treatment process Packing Size: 18.3*7.7*8cm (inner diameter 7cm) Weight: 39g includes: 1 *Bottle cage "