I clean Accessory for iRobot Roomba 770,760,780,790,650,620,630,680 Series Vacuum Cleaner Replacement Parts Kit (3 pcs Flexible Beater Brush) Compatible: Fit for iRobot Roomba 600 700 Series (620 630 650 660 680 760 770 780 790) Vacuum Cleaning Robots. Warranty:30 days replacement or refund, Please Feel Free to Contact us first. Replace and clean your iRobot roomba bristle brush every 2-3 months for Keep your iRobot Roomba operating at peak performance! These roomba vacuum cleaner parts can maintain Roomba's cleaning performance while reducing infiltration of dust, pollen and other allergens into the air you breathe. What can you get:3 packs Flexible Beater Brush.