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 ensure the cleaning effect. The parts a longer life cycle and better cleaning effect, which protects the robot from excessive wear and shortens the service life. Vacuum Cleaner Parts Silver Ion Bacteriostatic Module Compatible for X10 S10 W10S S20 X20 Size: about 41 x 25 x 20 mm Material: plastic Color: white Package Contents: 3 x Silver Ion Bacteriostatic Modules Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.