The Replacement parts kit is compatible with compatible iRobot Roomba s9 (9150) s9+ s9 plus (9550) Wi-Fi connected robot vacuum cleaner. High efficiency and high-quality rubber roller brush, environmentally friendly material, resistant, delicate and soft, effectively helps the robot vacuum cleaner to clean the floor, offer you a clean and fresh air environment. Replace the compatible irobot roomba filter every 2-3 months to maintain vacumm cleaning per compatiblemance while reducing infiltration of dust. Easy to Install: It is easy compatible you to install this vacuum brush kit without any complex steps and give you a good experience of cleaning. : Material: rubber Package Contents: 4 * Roller brush Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.