We offer discount for large quantity. Welcome to contact with us! 100% Quality Guaranteed !!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 best results, filters should be replaced every 2 - 3 months.Color: As ShownMaterial: plasticPackage Contents:4 x side brushes4 x filter elements4 x mops1 pair of main brushesOnly 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.