FM3-4104-000 Copyboard Cover Hinge compatible with MF4010, MF4012, MF4120, MF4122, MF4140, MF4150, 4018, 4010, 4012, 4120, 4122, and 4140 printers.This hinge is designed to replace the copyboard cover hinge and restore proper function of the cover mechanism.It is a direct-fit replacement part for the specified models.