Features:_x000D_ _x000D_ Replacement filter for the Roborock S50 S51. _x000D_ Compatible with Roborock S50 vacuum cleaning robot. _x000D_ As part of routine maintenance, the side brush is easy to remove and replace. _x000D_ Reduce dust, pollen and other allergens into the air you breathe. _x000D_ For best results, the filter or side brush should be replaced every 2-3 months. _x000D_ Millet robot vacuum cleaner and efficient filter, unique design, easy to clean dust box, durable. _x000D_ The side brush: millet mechanical vacuum cleaner practical side brush, nylon brush, will not scratch the floor and furniture, unique design, easy to collect hair. _x000D_ Main brush: millet mechanical vacuum cleaner practical roller brush, floating structure, deep cleaning, nylon brush, will not scrape the floor, detachable design, easy to clean. _x000D_ _x000D_ Specification:_x000D_ Filter size: about 165 * 57 * 18mm/ 64.9 * 22.4 * 7in_x000D_ Roller size: about 200 * 35 * 35mm/ 78.7 * 13.7 * 13.7in_x000D_ Package weight: about 130g/4.5oz_x000D_ Main function: filter dust_x000D_ Packing: PE sealed bag packaging_x000D_ Material: ABS_x000D_ _x000D_ Package List:_x000D_ 1 * Roller brush_x000D_ 2 * Filters_x000D_ 2 * Side Brushes 1Replacement filter for the Roborock S50 S51. 2Compatible with Roborock S50 vacuum cleaning robot. 3Millet robot vacuum cleaner and efficient filter, unique design, easy to clean dust box, durable. 4The side brush: millet mechanical vacuum cleaner practical side brush, nylon brush, will not scratch the floor and furniture, unique design, easy to collect hair. 5Main brush: millet mechanical vacuum cleaner practical roller brush, floating structure, deep cleaning, nylon brush, will not scrape the floor, detachable design, easy to clean.