The Canon FB4-3687-000 is a specialized corona tungsten wire spool designed for the charging systems of laser printers and copiers. Manufactured in Japan, this component consists of high-quality tungsten wire with a precise diameter of 0.06 mm, providing a total length of 20 meters on the spool. This part is engineered specifically for use within the imageRUNNER series, ensuring compatibility across a wide range of models such as the IR C7055, IR 5000, and various others including the 6570, 8105, and 9070. It serves as an essential element for technicians maintaining these machines to ensure consistent print quality through reliable corona charging.