Perfect Fit: These iRobot Roomba S9 Plus rollers fit iRobot Roomba S Series S9 (9150) S9+ S9 Plus (9550) robot vacuum cleaner. Works perfectly and is easy to install. High Quality Rubber Roller Brush: Environmentally friendly material, durable, delicate and soft, effectively helps the robot vacuum to clean the floor. Easy to Clean and Replace: The package includes 2 iRobot Roomba S9 roller brushes, clean and replace the brushes regularly to improve suction and performance and extend the life of your robot vacuum. Tip: It is better to replace 1-3 months of Roomba S9 replacement parts to keep your vacuum cleaner in good condition. Easy to Install: Snaps into place for quick and effortless replacement. No tools are required, easy to replace the main brush.