Instant purchase OK(^^♪ iRobot Roomba 800 900 Series Edge Cleaning Brush Replacement Spare Repair Parts Consumables 3 pieces ■ This is a compatible edge cleaning brush for iRobot Roomba 800/900 series. It fits both "blue side brush module" and "gray side brush module" products. ■ Compatible models: 870 871 875 876 878 880 885 890 960 980, etc., generally all 800/900 series ■ This is a compatible edge cleaning brush for Roomba to sweep out debris from hard-to-clean areas such as walls and room corners while rotating. If your vacuum cleaner isn't picking up much debris, try replacing the edge cleaning brush. ■ Quality is the same as the original: (1) Excellent abrasion resistance, toughness, and durability. (2) Fits the ground and doesn't miss sweeping. 5. How to replace: (1) Loosen the edge brush screw and remove it. (2) Attach the new edge brush to its original location and tighten the screw.