General description The 9pcs replacement parts are designed for compatibility with J7+ self-draining robot vacuum cleaners and mops. These parts include side brushes that enhance cleaning efficiency by reaching corners, walls, and baseboards, thus providing a larger cleaning area. Technical specifications Color: Green Material: Plastic Package Contents: 9 x Side Brushes Measurement allowed error: +/- 1-3cm Usage Maintain the brushes once a week (twice a week for homes with pets). Replace the brushes every 3-4 months for optimal performance. Other information Note: Light reflections and different displays may cause the color of the item in the picture to differ slightly from the actual product.