The filter kit compatible with iRobot Roomba robot vacuum cleaners 900 series 980 966 960, 800 Series 886 880 876 875 871 870 866 865 860 850 805, etc. The fitlers effectively purify the air by capturing dust, pollen, pet dander and allergens. Easy to replace. Keep Roomba operating at peak performance by changing the filters every 3~6 months, depending on how often you use them. Note: The data are all measured manually, please allow 1-3cm error in Due to differences in light and display, there may be some color differences, please refer to the actual item received.