Rolling brush support: only support direct drive series V7/V8 mop headsFilters maintain the cleaning efficiency of the robot, reducing the ingress of dust, pollen and other allergens to the air.it's easy to remove dirt, dust, and trash in corners and edges from the accessories, especially human hair and pet's hair.Note: The accessories should be replaced every 2 to 3 months.Accessories parts are durable and easy to installcolour: blue/purpleMaterial: plasticPackage Contents:1 x Roller Brush2 x pre-filter2 x post filter1 x cleaning brushOnly 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.