Compatibility-The main filter replacement parts are available for the Eufy RoboVac 11S&RoboVac 30 and the RoboVac 30C and RoboVac 15C. High performance-The filter keeps the robot clean and removes the dust generated during the cleaning process and reduces secondary air pollution. Maintenance-Replace the consumables kit every 2 to 3 months depending on how often you use it to keep your robot running at peak performance. Size:137*68 mm Color:light blue material:plastic Package Contents: 2* main filter Only the above package content, other products are not included. Note: Light shooting 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.