I clean Replacement Robot Vacuum Cleaner Parts 5Pcs Side Brushes 6-arms & 5Pcs Side Brushes 3-arms for iRobot Roomba 770, 780, 790, 650, 595, 630,with A Free Cleaning Brush Compatible with for iRobot Roomba 500,600,700 series. eg;roomba 770, roomba 780, roomba 650, roomba 790, roomba 560, roomba 595, roomba 630. These side brushes are easy to remove and replace as part of routine maintenance. To make your home more cleaner,more comfortable Keep your iRobot Roomba operating at peak performance.The replacement roomba vacuum parts should be replaced every 2 - 3 months. **How to replace it**:1.Loosen the side brush with a coin or small screwdriver. 2.Remove the side brush, clean the side brush and the brush post, and reinstall the side brush. What do you get: 5 Packs* replacement 3-Arms side brushes, and 5 Packs* replacement 6-Arms side brushes with some screws.