For the health of you and your family, and to take good care of your robot, it is recommended to choose high-quality products and replace the accessories to the cleaning effect. The parts have a longer life cycle and better cleaning effect, which protects the robot from excessive wear and reduces the service life. Vacuum Cleaner Parts Silver ion Bacteriostatic Module Compaitble for X10 S10 W10S S20 X20 size: about 41 x 25 x 20mm Material: plastic colour: white Package Contents: 3 x Silver ion Bacteriostatic Module Only the above package content, other products are not included. Note: Light reflection 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.