XLAB Mini Wing 105 dual bottle system tucks neatly behind your saddle for easy access to hydration. Ergonomically designed for easy access the bottles even with limited flexibility, and mounts low to not hinder your ability to get on and off the bike. FEATURES: High-gripping XENON cages tout an 8lbs grip force (approx) – within the ideal range of rear system grip force for worry-free bottle retention Easily mounts with a single screw to tighten on saddle rails SPECS: Material: Aluminum Bottle Type: Standard Color: Black Access Style: Top Mount Type: Saddle Rails