GTJ Adjustable Bike Bicycle Water Bottle Holder Rack Cage Black Size: 0'5"*0'5"*0'3"(14.5*14.5*8cm) Material: ABS resin, polypropylene Cup holder diameter: about 0'3"(8cm) Holder can rotate 360 degrees It can be fitted on handlebar, under seat, down tube, fork, front pipe