This is the gear that connects the brush motor to the brush. Universal suitable for Neato D75 80 D80 85 D85 Connected D3 D4 D5 D6 D7 D8. Made of high quality material, durable and practical. The gear is not easy to break, long service life. Accurate size and shape design make it easy installation. If you have any problems with the accessory, please contact us and we will give you satisfied answer. Package: 1x Main Brush Module Gear