General description Replacement parts for the IRobot Roomba S9 (9150), S9+ (9550), and S Series include high-performance HEPA filters, side brushes, and dust bags designed to enhance the cleaning efficiency of your robot vacuum cleaner. Technical specifications HEPA filter blocks 99.97% of particles as small as 0.3 microns Each dust bag holds up to 30 bins of dirt and debris Measurement allowed error: +/- 1-3 cm Maintenance Replace HEPA filters every 2 months Replace side brushes every 6 months, or depending on usage Package Contents 4 x HEPA filters 4 x side brushes 2 x replacement dust bags 2 sets x main brushes Other information Color: as shown Material: plastic Note: Light shooting and different displays may cause the color of the item in the picture to differ slightly from the actual product.