High effective fan motor separate partRadiator types: fanSide brushes are smooth to take away and update as a part of routine upkeep maintain Roomba&;s cleansing functionality while reducing infiltration of dust, pollen and other allergens into the air you breathe perfect results, filters needs to be changed each 2 - 3 months filters for Xiaomi Mi Robot Clean brushes hold your home robot working at peak performance for Xiaomi Mi Robot Only with model:Item For Xiaomi Mi Vacuum 1 mijia RobotColour:blackMaterial:plasticSize:8cm in diameterPackage Contents:1*Engine Ventilator Fan MotorOnly the above equipment content, other merchandise are usually not included: Light shooting and various displays can cause the color of the article in the picture a chunk varied from the genuine thing. The measurement allowed error is +/- 1-3cm.