High quality fan motor separate partRadiator types: fanSide brushes are easy to remove and replace as part of routine maintenance.Filters maintain For 's cleaning performance while reducing infiltration of dust, pollen and other into the air you breathe.For best results, filters should be replaced every 2 - 3 months.Replacement filters for Mi Robot Clean brushes keep your home robot operating at performance.Use for Mi Robot Only.Compatible with model:Item For Mi Vacuum 1 RobotColour:blackMaterial:plasticSize:8cm in diameterPackage Contents:1*Engine Ventilator Fan MotorOnly the above package content, other products are not included.Note: Light 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.