Material: Durable hard plastic, not easy to break. Designed to hold cups, cans and bottles. Fits any bike with or without a bottle cage. Size: diameter: 1.5cm~4.2cm. Easy Install: Our bike water bottle holder requires no other assembly tools and can be installed in less than 60 seconds. Simply attach the cages into the screw holes in the frame and tighten the screws. The stroller cup holder can be firmly fixed in the position you wish to fix. Adjustable with 360 Degree Rotation: Easy install and remove, make sure it fits bike pipe size by twisting the screws. So you can mount it on handlebar, under seat or down tube, fork, front tube etc. . With this bike bottle cage, you can quickly and easily access your water bottle when you need it. Various Applications: The bike bottle holder is perfect for various bikes such as road bike, folding bike, mountain bike, hybrid bike. also perfect to use on other vehicles such as quads, strollers, wheelchairs. No need worry about the water cup falling off the bike, so you can ride with confidence. 100% Satisfaction Guarantee: Dear friend, we appreciated for your purchase of our stroller bottle cage, sincerely hope you can get satisfied service and high quality products from our Tusenpy store. Any problems, please contact us at the first time. Full Money Back Guarantee or free replacement if you are not satisfied with our stroller bottle cage I wish you a pleasant shopping tri .