Panasonic Bicycle Bell Genuine Product NKB243 Black Silver [From the Site] A bell that is durable and doesn't get in the way. An inside bell that can be installed inside the handlebars, such as on Panasonic Vivi・DX and Vivi・YX! It is a bell that is durable and does not get in the way, even if you fall. Keeps the handlebars area tidy!! Of course, for Panasonic electric assist bicycles! Can be widely used on grip-shift bicycles with a handlebar diameter of 22.2mm. *Cannot be attached to bicycles with a front child seat. Examples of standard models: Vivi・EX (BE-FE633 FE-433) Vivi・DX (BE-FD633 FD433) Vivi・SX (BE-FS633 FS433) Timo・S (BE-FTS633) Timo・A (BE-FTA634) Vivi・YX (BE-FY633 FY-433), etc. A bell that is durable and doesn't get in the way.