ITEM NAME:Eufy 11S Filter Replacement with RoboVac 30 Filter Vacuum Cleaner Accessori Q2S2 Eufy 11S Filter Replacement with RoboVac 30 Filter Vacuum Cleaner Accessori Q2S2 Compatible - Replacement parts for Eufy RoboVac 11S and RoboVac 30. (Please confirm your robot model and filter size before purchase!) High performance - embedded in place for quick and easy replacement. Easily change filters without tools. Maintenance - Replace the filter every 2 to 3 months depending on how often you use it to get the best performance from your robot. Tips and tricks: 1. Change the filter every 3~6 months (depending on the frequency of use) 2. Secure the assembler in place for quick and easy replacement. No tools required. How to replace a filter set: 1. Remove the dirt bin. 2. Place the new filter set in the dirt box. (Make sure the black sponge filter at the bottom) 3. Close the filter door and replace the dust box with the robot cleaning tool. Colour:White + black Material:Plastic + sponge Package Contents: 10 * HEPA filter 10 * black sponge filter