General description Brand new, high-quality brush set replacement for iRobot Roomba 600 and 700 Series (models 690, 650, 620, 630, 652, 655, 660, 760, 770, 780). These cleaning accessories are designed to keep your home robot running at its best, ensuring optimal performance and cleanliness. Technical specifications Type: Sweeper Accessories Material: Plastic Package Contents: 6 x Sweeper Brush Measurement allowed error: +/- 1-3 cm Usage To achieve the best cleaning effect, it is recommended to replace the cleaning accessories every 2 to 3 months, depending on the frequency of use. Regular replacement helps maintain the efficiency of your robot vacuum and reduces the infiltration of dust, pollen, and other allergens into the air.