clean brush keeps your home robot running at peak performance. Side brushes are easy to remove and replace as part of routine maintenance. For S7 T7S T7PLUS robot vacuum cleaner replacement filter. The filter maintains the robot's clean performance while reducing the entry of dust, pollen, and other allergens into the air you breathe. For best results, replacement parts should be replaced every 2 to 3 months. Material: Plastic Color: As shown Package Contents: 1 x Rotating Brush 6 x Side Brush 3 x Dust Bag 4 x Filter 5 x Mop 2 x Cleaning Tool Only the above package content, other products are not included. Note: Shooting Light and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.