Each pack contains a set of 13 pieces: 3 x 800/900 Series Side Brushes 3 x 800/900 HEPA Filters 2 x AeroForce Extractor Set 5 x Screws [ 100% COMPATIBLE ROOMBA ACCESSORIES ] - Replacement Parts Perfectly Compatible with Roomba Series 800 805 810 820 825 830 840 850 851 860 865 866 870 871 876 877 880 885 886 890 891 896 900 920 925 930 935 940 945 950 960 966 970 975 980 985 990 Robot Vacuum Cleaners. [ DESIGN DESIGN ] -- The adaptable accessory kit for your Roomba series is designed to fully satisfy the maintenance of your household appliances. Roomba 800 replacement parts made of high-strength and environmental protection material, replace them timely and increase the lifespan of your equipment. [ IMPROVE CLEANING EFFICIENCY ] --- The HEPA filter for Roomba 800/900 series significantly increases the amount of dust, pollen, dander and allergens captured by the innovative filter design. The side brush for along the edges to remove dirt, dust and debris. [ WHAT YOU CAN GET ] - 3 x Side