Compatible models: Roomba Combo Series Robots for iRobot combi113 r113840 The kit includes: 3 reusable cleaning cloths With their absorbent fibers, the reusable cleaning cloths eliminate stubborn stains, dust and dirt. As part of normal maintenance, it can be easily removed and replaced. To ensure the life of the robot to work at optimal performance, it is best to replace spare parts every 2 to 3 months. As part of normal maintenance, it can be easily removed and replaced.