This is a genuine OEM replacement part. This is the drive gear assembly for the ram that compacts the trash inside your appliance. If your ram is getting stuck, if there is excess noise during operation, or if your compactor does not stop at the end of the compacting cycle you may have an issue with your driver gear. The gear is made of plastic, it is white in color, and it is approximately 4.5? in diameter. This driver gear kit includes both gear, pin spring, retaining clip (c-ring), ram stop, ram cam, and instructions. Before you replace the drive gear in your trash compactor make sure it is unplugged.