Replacement Accessory for Irobot Roomba 800&900 series: all the parts are strictly tested to make sure it perfect for iRobot Roomba 850 860 861 866 890 891 894 880 870 971 980 960 961 964 990 995 Highly Efficient Hepa Filter: Normally we need to change the HEPA filter every 3-6 months ,this filter paper is made of PM2.5,the purification efficiency is as high as 99.98%,filter tiny particles to make the released air more fresh,prevent secondary pollution,effectively protect motor from inhaling tiny dust,prolong the servie life ,which is to extend the service life of the sweeper. Armed-3 side brushes: strong anti-winding structure, closely fitted with the side brush suction,gold tilt angle of the rubber arm,effectively rubbing the rubbish into the main brush. Grind nylon hair bristles,good hardness ,the side brush will not scratch the floor and furniture, greatly ensure the safety and cleaning effect during the process of the use. Multi-Surface Rubber Brushes: To use very soft wear-resistant rubber,special grain,completely solves the winding problem,higher garbage capture rate, zigzag tread design on the roller brush, strongly decompose the debris, break the hair,also 99% hair will be removed. Compared with previous generations, the 800&900 series performance is improved 51%,much effective, higher performance. Valuable Package & Customer Service Includes 1 set of debris extractor Rubber Brushes,4 pcs filter, 4 pcs armed-3 side brushes & 4 screws.If you meet any quality or other problems after the purchase we will solve it in 24 hours. Enhance the performance of your iRobot Roomba 800 and 900 series vacuums with this accessory kit from ANBOO. Compatible with a wide range of models, this kit includes 4 high-efficiency HEPA filters, 4 side brushes, and 1 set of debris extractor rubber brushes. The filters, made of PM2.5, offer a purification efficiency of up to 99.98%, effectively filtering tiny particles and preventing secondary pollution. The side brushes feature a strong anti-winding structure and nylon hair bristles, ensuring a close fit with the suction and gentle cleaning of your floors and furniture. The debris extractor rubber brushes, made of soft, wear-resistant rubber, have a zigzag tread design that strongly decomposes debris and breaks hair, increasing the hair removal rate by 99%. This kit is reusable and easy to install, with 4 screws included for secure attachment. Experience improved cleaning performance and a longer service life for your iRobot Roomba with this accessory kit from ANBOO.