Material: plasticSize: 14.7*6.5cmFixed seat applicable diameter: 2-4CM (diameter)Features:The diameter of the cup holder is about 6.5 cm, which is slightly elastic, but not very elastic;Suitable for folding cars, road cars, mountain bikes, ladies cars, and other models;Quick-release free-hanging bottle cage;Suitable for front and rear riders, faucet, head tube, front fork, top tube, front and rear left and right seat tubes;The fixed seat can be rotated 360 degrees + a quick-release design;Applicable pipe diameter of the fixed seat: 2-4CM (diameter);The fixed seat can be separated from the bottle cage, and can be installed on the upper and lower pipes as a general bottle cage;Comfortable and easy, quicker disassembly, can be removed from the bike at any time to avoid loss. 11. Universal Water Bottle Holder: Our bicycle water bottle holder is compatible with most sizes of bicycle water bottles and can fit on folding bikes, road bikes, mountain bikes, electric bikes, women's bikes, strollers, and wheelchairs, and more. 22. 360 Rotatable Design: With the 360 swivel clamp, the bicycle bottle holder can be mounted on the handlebar, steering wheel, down tube, saddle, fork, head tube, and adjusted to any angle to meet your actual needs. Don't worry about the water bottle falling out. 33. Non-slip: The water bottle holder comes with 2 black spacers, and the included clip helps to hold your water bottle tightly, hold it in place and effectively prevent it from falling off the bike. 44. Flexible Bike Cup Holder: The bottle holder is 5.8"/14.7cm in length and 2.5"/6.5cm in diameter. Also, the adjustable clamps are 0.8-1.6"/2-4 cm in diameter. You can adjust the tension of the clips by turning the screws on the stand for a perfect fit on your bike. 55. Easy to Install: You can turn the clip clockwise to fix the water bottle holder and remove it easily at any time. If you have any installation questions or other questions, please feel free to contact us.