UNIVERSAL COMPATIBILITY - Suitable for all types of bicycles: road bike, mountain bike, hybrid wheel, electric, folding bike... and holds bottles up to 1.5 litres. HIGH QUALITY ALUMINUM - Lightweight, durable and corrosion-resistant material, for durable use in all conditions. FRAME PROTECTION - Smooth, rounded design that will not damage the paint or structure of your bike. QUICK AND SECURE FITTING - Easy to install with two standard screws (not included) for a stable grip even on uneven roads. ERGONOMIC DESIGN - Flexible structure that makes it easy to put in and take off the bottle quickly while driving.