General description Replacement Parts Compatible for iRobot Roomba s9 (9150), s9+, and s9 Plus (9550) Vacuum Cleaner. This set includes essential components to maintain your robot vacuum's performance. Technical specifications Includes: 2 x filters 4 x side brushes 2 x bags 1 set of rubber brushes Usage To keep your home robot running at peak performance and to reduce battery consumption, filters and brushes should be replaced every 2-3 months. The side brush effectively reaches deep into corners and edges to remove more dirt, dust, and debris. The filters help reduce dust infiltration and rid the air of allergens and other particles. Other information (Please confirm your robot model before purchase)