The Invisible Bicycle Q Bell is made of Aluminum and is literally invisible to maintain the clean sleek look of your handlebar<br><br>Fits all handlebar Mountain &amp; city bikes - crisp and clear ringtone. up to 90db decibel Sound. Great for all men's women's &amp; kids bikes <br><br>Featured<br>Material: Aluminum alloy / ABS / PP<br>Net weight: 0.59 oz. (0.17kg)<br>Size: 38.5X15MM<br>Applicable <br>handlebar: 22.2-24MM<br><br>Package:<br>1 x Qbell in a box