[Compatibility] Accessories kit compatible with for X20 Pro/X20 Vacuum Cleaner. This set works as great as the old ones, precision fit and easy install. [Hepa Filter] HEPA filter is made of high-strength environmental-friendly materials, which can block most of dust down to 0.3 micrometer. The filter can maintain the cleaning performance of the sweeper, while reducing the penetration of dust, pollen and other into the air you breathe [High Quality] Replacement Filter: A dirty filter will greatly reduce suction power. Depending on the vacuuming frequency and amount of dirt cleaned, for performance, change the filter at least every 3 to 6 months. [Easy To Install] Replacement Parts is easy to be replaced and installed on your robot vacuums, Snap into place for quick and effortless routine replacement without tools. [Maintenance] Replacement Filter: A dirty filter will greatly reduce suction power. Depending on the vacuuming frequency and amount of dirt cleaned, for performance, change the filter at least every 3 to 6 months. Compatible with model:For X20 Pro/X20 robot Quantity:4PCS Colour:Black-White Material:Plastic Package Contents: 4 * Hepa Filters 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.