General description The replacement parts are compatible with the AI robot vacuum cleaner models AV2501S, RV2502AE, RV2520AOUS, and AV2510AOUS. These parts are designed to enhance the performance and longevity of your vacuum cleaner. Technical specifications Color: black + white Material: plastic Package Contents: 2 x Main Brushes 4 x Orange Filters 1 x Pre-Filter 1 x Black Filter 4 x Foam and Felt Filters 8 x Side Brushes 1 x Cleaning Tool Measurement allowed error: +/- 1-3 cm Installation Replacement parts are easy to install without any tools. Usage Clean and replace regularly to improve suction and performance. It is recommended to replace or clean the parts every 2 to 4 months. If the robot is noisy or not working, check if the roller brush is blocked. Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing.