●Part number: 42294300203. ●The trimmer stop switch is compatible with Stihl FS38 FS45 FS46 FS55 BG45 BG55 BG65 BT45. ●Made of metal and PVC, durable, rust resistant, and can be used for a long time. ●Lawn mower circuit trimmer On Off stop switch size at 21x20x15mm, pin: 2pin. ●Please confirm the model carefully.