Compatibility : Suitable For Irobot Roomba S9 (9150) S9 And S9 Plus (9550) With Wi-Fi Connection.The Filter Screen Can Remove Fine Dust And Dust Produced By Bacteria And Reduce Secondary Air Pollution (For Best Results, The Filter Screen Should Be Replaced Every 2-3 Months).Each Bag Holds 30 Dirt Bins. And Debris. Easy To Remove, No Dust And Mist.Side Brush Gets Deep Into Corners And Edges To Remove More Dirt, Dust And Debris. ;Breakage.Easy To Clean; Replace: High Quality. As Part Of Routine Maintenance, It Is Easy To Clean. Disassemble And Replace. These Products Allow Your Vacuum Cleaner To Perform At Its Best.Size: FContents: 2 Brushes; Rollers + 4 Side Brushes + 4 Hepa Filters (Pcs) Note: You Need To Measure The Old Brushes To Make Sure The Item Fits. Your Vacuum Cleaner. Due To The Different Manual Measurements, Measurement Methods And Tools, The Size May Be Slightly Different. The Color Of The Item May Be Different From The Pictures, Depending On Your Computer'S Display And Lighting Settings. Please Note That This Part Is Not An Original Spare Part And The Manufacturer'S Name And Part Number Are Provided To You. Indicative Title Only.