1. Vacuum Cleaner Accessories for Roomba 800 & 900 Series: All parts are rigorously tested to make sure they fit perfectly with Roomba 800 805 860 861 865 866 870 871 880 885 900 960 966 980 etc.^2.Hepa filter: Usually we need to change the HEPA filter every 3-6 months. This filter paper consists of PM2.5. The cleaning efficiency is 99.98%. Filter tiny particles to make the air that is released fresher. Prevent secondary filter pollution, effectively protect motor from inhaling tiny dust, extend service life, which should extend the life of the sweeper.^3.These spare parts are made of high quality PC, utilize the efficiency, and are made of durable filter and side brush material.^4. Remove hair, dirt, or 99.97% of all particles to purge dust, allergens and other particles from the air. Particularly suitable for families who feed pets.^5. Package include: 2 * rollers 4 * 3-arm side brush 4 * Hepafilter 4 * screws.