This is a High Quality Bristle & Beater Brush Combo Pack Designed To Fit iRobot Roomba 500, 600 Series. Designed & Engineered By Crucial Vacuum.Combo Pack includes 1 Bristle Brush and 1 Flexible Beater Brush. Replacing your brushes brings your Roomba back to top cleaning performance. Recommended to clean your brushes every 1 to 3 uses.Compare To Bristle Brush part # 81701 & Beater Brush part # 82301Designed To Fit:iRobot Roomba models: 510, 530, 535, 540, 550, 560, 570, 580, 610This is a generic product designed and engineered in the United States by Crucial Vacuum. This is not a Roomba® OEM product and is not covered under any Roomba® manufacturer"s warranty. The Roomba® brand names and logos are the registered trademarks of their respective owners. Any use of the Roomba® brand name or model designation for this product is made solely for purposes of demonstrating compatibility.