Product DescriptionPackage Contents: Spare Parts for Brush Replacement Kit - Pack of 141.Accessories compatible with iRobot Roomba 800 and 900 series: 800 805 850 860 865 866 870 871 880 886 890 891 895 896 900 960 965 966 980.2.High Quality - The vacuum cleaner parts are designed for long life. The compatibility and durability of the accessories are rigorously tested. Made of high strength and environmentally friendly material.3.Each package include a set of 14pcs + 6 screws: 4x filters; 6x side brush with 3 arms; 2x Rubber brushes; 2x flexible whisk brush.4.To optimize cleaning performance, clean the parts twice a week. And replace the accessories every 8 weeks.