Often replace the filter to help make indoor air more freshSide Brush:it will not scratch the floor and furnitureUnique design, easy to collect the hair material, durable in use.Filter helps reduce household odorsKeep your home clean by changing the filters frequently - once every month or two, depending your usage.Clean brushes keep your home robot operating at peak performance.Side brushes are easy to remove and replace as part of routine maintenance.Filters maintain cleaning performance while reducing infiltration of dust, pollen and other allergens into the air you breathe.For Xiaomi Roborock S7 T7S T7PLUS PartsColour:As shownMaterial:plasticPackage Contents:2 x roller brush10 x side brush10 x hepa filter10 x mop cloth2 x clean brushOnly 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.