Dual Protection Design: This main roller brush not only safeguards the robot vacuum's main body but also protects your delicate floors from scratches and damage, ensuring a longer lifespan for both your vacuum and flooring. Enhanced Suction Efficiency: By focusing the vacuum's suction power, this main brush minimizes the secondary dispersion of dirt and debris, making your cleaning sessions more effective and leaving your floors impeccably clean. Optimal Cleaning Performance: To maintain cleaning efficiency, it is recommended to replace the main brush every 6-12 months. Regular replacement helps prevent wear and tear and keeps your vacuum running smoothly. Compatibility and Precision: Specifically engineered for N30Pro models, this replacement brush ensures a and optimal functioning with your specific vacuum model. Colour:Black+Blue Material:plastic Package Contents: 2 x Roller Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.