[Perfect Replacement Parts] The replacement parts kit is compatible with iRobot Roomba 800 900 series 805 860 870 871 880 890 960 980 981 985 vacuum cleaners. The accessories contain everything you need to maintain your robot in one convenient kit. [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%, filters out tiny particles to make the release. fresher air, prevents secondary pollution, effectively protects the motor from inhaling tiny dust, extends the service life, which extends the life of the sweeper. [Armed-3 side brushes]: Strong anti-winding structure, closely fitted to the suction of the side brush, golden tilt angle of the rubber arm, effectively scrubbing the trash into the main brush. Grinded nylon bristles, good hardness, the side brush will not scratch the floor and furniture, greatly ensuring the safety and cleaning effect during the use