Amyehouse 2 Sets Tangle-Free Debris Extractor Set Replacement Parts For iRobot Roomba 800 900 series 805 860 870 871 880 890 960 980 The replacement parts kit is compatible with iRobot Roomba 800 900 Series 805 860 870 871 880 890 960 980 Vacuum Cleaner. The innovative counter-rotating debris extractor break down debris and lift dirt while the brushless design is virtually maintenance-free. Set includes one front and one rear extractor. We recommend that your clean Roomba's extractor brushes every 1-3 uses (depending upon the amount of dirt and debris in your home) Package includes two pairs of individual extractors.Shipping with safeguard package-- Shipping with high strength safeguard protected box, prevent bending and compressing. 100% SATISFACTION GUARANTEED,OR YOU WILL GET REPLACEMENT OR REFUND, Please contact us if you have any questions.