Filters maintain robot's cleaning performance while reducing infiltration of dust, pollen and other allergens into the air you breathe For best results, spare parts should be replaced every 2 - 3 monthsReplacement Vacuum Cleaner Accessories for Xiaomi Roborock S7 T7S T7PLUS Vacuum Cleaner Robots Clean brushes keep your home robot operating at peak performance Side brushes are easy to remove and replace as part of routine maintenance Colour: as shown Material: plastic Package Contents:2 x Main brush2 x white side brush2 x Black side brush4 x mop cloth4 x Filter Only 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