Product information:    

Material: The front end is made of stainless alloy and electroplated chromium, and the surface does not rust; the back end is a ball-shaped elastic rubber airbag. The air is released when the hand is pinched, and it is automatically inhaled and restored when the hand is released.
Features: The sound quality is loud and crisp, the winding-type appearance is stylish, and the front is equipped with a bell vent for easy sound output; the price is affordable, and it can be applied to folding bikes, mountain bikes, city bikes, etc.

   Size Information:  

Length: Approximately 180mm
Bell mouth diameter: 75mm
Rubber ball diameter: 65mm