The Courtesy Flexi bell gives you the flexibility to mount it on handlebars of any diameter and other locations such as your stem. Its diminutive size and clean tone make it a great way to announce to other path users that you are passing on the left. - Stretch strap mounts quickly and securely attaches to bars or stem - Diminutive size won't clutter up your handlebars - Lightweight brass bell has a clean sound - Fits bar diameters 16mm - 42mm - 360-degree dinger rotation for perfect positioning - High fatigue spring