1. Clean brushes keep your home robot operating at peak performance. 2. Side brushes are easy to remove and replace as part of routine maintenance. 3. Filters maintain cleaning performance while reducing the infiltration of dust, pollen, and other allergens into the air you breathe. 4. For best results, filters should be replaced every 2 to 3 months. Applicable models: for H11 / H11 Max Color: as shown Material: plastic Package Contents: 1 * Roller Brush 2 * HEPA Filter 1 * Clean 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 a little different from the real thing. The measurement allowed error is +/- 1-3 cm.