The clamp is thoughtfully designed for effortless installation and removal, easily mounting in a matter of seconds without the need for tools. The water bottle holder is versatile and can secure a variety of bottle sizes in multiple locations, including the handlebar, under the seat, down tube, and fork. Clamp Stretching Range: 1.9-4.2cm /0.75-1.65inch Suitable for Bottle Diameter: within 8cm / 3.15inch Weight: Approx. 95G