Roborock S7 T7S Plus robot mop and vacuum with auto-empty The parts and accessories are made from environmentally friendly materials and are virtually maintenance-free. In order for your robot to work at optimal performance, it is recommended to replace the parts every 2-3 months. It is easy to replace and install on your robot vacuum cleaner. The filter can be washed directly with clean water, making the filter look like new in one minute. Double filtration by mesh screen and filter paper, higher efficiency, cleaner air, long service life. Colour:As Shown Material:plastic Package Contents: 1 x filter set Only the above package content, other products are not included. Note: Light reflection 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.