Copyboard cover hinge compatible with models MF 4010, 4012, 4018, 4120, 4122, 4140, 4150, 4300, 4310, 4318, 4320, 4322, 4330, 4340, 4350, 4352, and 4370, 4380.Designed to replace the hinge component for secure attachment of the copyboard cover.Constructed to match the specifications of the specified models for proper fit and function. This is a replacement item from an aftermarket supplier.Brand names are cited solely to demonstrate device compatibility.