Compatible with the Roborock S8 MaxV Ultra vacuum robot. The latest model: compatible with the dual brush system and the dual Vibrarise system with two vibration modules. Set contents: 4x HEPA filters. The high-quality replacement filter improves the air quality in your home, ensuring fresher air and a healthier living environment. At the same time, it prevents larger particles from entering the motor, contributing to the long lifespan of your vacuum cleaner. Best quality.