Keep your home robot performing at best with clean brushes.The filter maintains the robot's cleaning efficiency while reducing dust, pollen, and other allergens from entering the air you .For best results, the filter should be replaced 2 to 3 months.Made of high-strength and environmentally friendly materials, more durable.High-density soft bristles, suitable for hard floors, such as wooden floors, , tiles, etc.Product Category: Scrubber AccessoriesApplicable models: Floor One 3.0Function: CleaningUse environment: householdcolor:Photo colorMaterial:plasticPackage Contents:1 x Main Brush1 x FilterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.