... Plastic -ABSBrushPPRolling brush HIPSstructure1, Rubber Strip2, Rubber Bumper3, Cleaning Flap DoorWheelTwo Small Front Wheels and Two Big Back WheelsColorColors ... own R&D department.3,High suction efficiency ,strong cleaning ability and low noise 2,Advantage:With a vacuum ... brush can be carried out on the capet deep cleaning, use of flexible, with in cleaning stairs, furniture, pullman and so on.