General description The For 3090 Main Roller Brush Kit is a set of replacement parts designed specifically for 3090 Series Robot Vacuum Cleaners. This kit includes three high-quality anti-curl roller brushes that effectively regulate rotation and prevent hair from tangling, ensuring optimal performance of your vacuum cleaner. Technical specifications Material: Plastic Size: 195 x 40 mm Package Contents: 3 Main Brushes Measurement allowed error: +/- 1-3 cm Usage For best results, it is recommended to replace the roller brushes every 1 to 3 months to maintain the efficiency of your vacuum cleaner. Other information Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product.