General description The Replacement Parts are compatible with S9 (9150), S9+ and S9 Plus (9550) robot vacuum cleaners. These high-efficiency rubber roller brushes are made from environmentally friendly materials, ensuring durability while being soft and delicate, which effectively aids in cleaning floors. It is recommended to replace the filter every 2-3 months to maintain optimal vacuum cleaning performance and reduce dust infiltration. Technical specifications Material: Plastic + Rubber Package Contents: 6 x Main Brush Measurement allowed error: +/- 1-3 cm Installation Easy to install without any complex steps. Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.