Yikebo(TM) 3 Sets Tangle-Free Debris Extractor Set replacement For iRobot Roomba 800 series 870 880 Compatible with: iRobot Roomba 800 Series (870, 880) Vacuum Cleaning Robots 6 individual extractors for use in iRobot 800 series Robots The innovative counter-rotating debris extractors break down debris and lift dirt while the brushless design is virtually maintenance-free.