General description HEPA filters compatible with Compact RO4811EA are designed to maintain the cleaning efficiency of your robot vacuum while effectively reducing the ingress of dust, pollen, and other allergens in the air you breathe. These filters are easy to install and replace, ensuring optimal performance. Technical specifications Material: Plastic Package Contents: 4 front filters, 4 rear filters, 1 cleaning brush Measurement allowed error: +/- 1-3 cm Usage For best results, it is recommended to replace the filters every 2 to 3 months. Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.