6 Pack Replacement Mop Pads Compatible with iRobot Roomba Combo J7 J7+ – Washable and Reusable – Not Fit Roomba J7/J7+. Made of high quality materials, well made and durable. Made of microfiber, these cleaning cloths break down dirt, clean effectively and adhere easily to your robot vacuum. The mop can be easily removed and replaced as part of routine maintenance. This also reduces dust from entering the air you breathe. For optimal cleaning and filtration results, the cleaning pads should be replaced every 2 to 3 months depending on the frequency of use. Package includes: 6 replacement mops. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.