Description This item is a universal water bottle holder for bikes. Its secure and firm wrap around arm design keeps your bottle stable and stay in place even in bumpy roads. lightweight aluminium alloy construction with surface anodic oxidation finish not only increases its anti-corrosion performance for longer lifespan but also reduces much more weight. The bottle holder can be easily mounted on the handlebar, seatpost and other poles and tubes of the bike. Perfect for bikes without a storage basket.? Feature - Color: Black.- Material: Aluminium alloy and plastic.- Size: About 16x10x8 cm.- Adjustable bottle cage, can be adjusted at will, bringing convenience to the family.- There is a fixed screw adjustment knob on the bottom of the bottle cage.- The advantage of adjustment is that you can control the tension of your own, adapt to different thick water bottles.- Easy to mount the holder on the handlebar, seatpost and other poles and tubes of the bike.- Simple and practical design. Convenient to fetch drink from a bottle holder.- Ultra lightweight. Adds no extra weight to your bicycle, perfect for cycling travel.- Suitable for most types of bikes, including mountain bike, road bike, and folding bike and other bikes without a storage basket.- Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Packing list: 2 x Bike Cup Holders