Perfect replacement kit: This accessory kit is suitable for replacing iRobot Romba Robot Cleaner 805 850 860 861 866 890 870 871 880 890 960 980 Replacement Frequency: It is recommended to replace replacement parts every 2-4 months to maintain your cleaner robot working with high performance new and high quality materials, well made, durable and high correspondence with original equipment Clean brushes keep your home robot at its best as part of routine maintenance, accessories are easy to disassemble and replace filter keeps Clean the robot while reducing the penetration of dust, pollen and other allergens into the air you breathe material: plastic color: as shown package contents: 1 set * roller brush 3 * filter 3 * side brush 1 * screwdriver 1 * cleaning brush only the package contents above, other products are not included error is +/- 1-3cm.