Main purpose: timely replacement can improve the cleaning efficiency and protect the engine. The recommended replacement time is 1-3 monthsHigh Quality: Nylon brush can help you solve most cleaning problems, HEPA filter can effectively help the robot vacuum cleaner to collect dust.Applicable models: for Xiaomi Mijia STYJ02YM vacuum cleaner.colour: as shownMaterial: PlasticPackage Contents:2 x roller brush2 x side brush4 x filter6 x mop cloth2 x 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.