1. Clean brushes keep your home robot operating at peak per compatiblemance. 2. Side brushes are easy to remove and replace as part of routine maintenance. 3. compatible best results, spare parts should be replaced every 2 - 3 months. Name: Vacuum cleaner accessories 4.Main Brush: Recommend to replace 6-12 months. Practical rolling brush compatible Xiaomi robotic vacuum cleanerFloating structure, deep cleaning. Material:plastic : Package Contents: 1 x main brush cover 1 x main brushes Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.