Main brush maintain the cleaning efficiency of the robot, reducing the ingress of dust, pollen and other to the air. The accessories should be replaced every 1 to 3 months.Let your run at its best. All the parts are made of high-strength and environmentally friendly materials.parts are and easy to install it's easy to remove dirt, dust, and trash in corners and edges from the accessories, especially and pet's hair. Adaptation model:For V8 Accessories Material:plastic colour:Purple Package Contents: 2 x Main brush Only the above package content, other products are not included. Note: Light 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.