Compatibility - This replacement kit is compatible with iRobot Roomba 800 850 851 860 865 866 870 871 876 880 885 886 890 891 896 900 960 966 980 990 - Replace the filter every three months. Effective cleaning - Keeping the house clean can effectively remove dirt and dust, debris or particles from corners and edges, and help eliminate dust, allergens and other particles in the air. Especially suitable for hair and pet hair. High quality made from environmentally friendly and high-strength materials. It has undergone rigorous testing for compatibility and durability. What You Get: A complete maintenance kit, each package includes 4 filter kits, 6 side brushes, 6 screws and 4 sets of rubber rollers. Like original parts - equivalent to original parts. Excellent value for money. It is very suitable for replacing worn parts. Compatible with iRobot Roomba 800 series 850 851 860 865 866 870 871 876 880 885 886 890 891 896 900 960 966 980 990 The filter should be replaced every 2-3 months for