Thank you for viewing. I am selling replacement micro switches for mice. Model Number: D2FC-F-7N (20M) Durability: 20 million clicks Quantity: 10 pieces Manufacturer: Omron [Micro Switch] This is a replacement part used when the mouse clicks stop working or when double-clicking (chattering) occurs. It is also used in electrical appliance switches, so please use it for parts replacement. micro switch chattering ringing mouse trackball