For 22.2mm handlebars. This is a rare bicycle bell that rings with a motor. It has a large build that suits work bikes and delivery bikes, giving it a strong presence (see mounting example). It's also recommended for electric bikes that use many electrical components. It's slightly larger than the vertical rotating bell also on sale. Operation confirmed. Limited stock (3 remaining) *The lid will be removed for packing during shipping. * Long-term storage item Work bike, delivery bike, vintage bicycle, retro, Showa retro