new, high-quality materials, well made, , and high matching with the equipment. Clean brushes keep your home robot at its best. As part of routine maintenance, accessories are easy to disassemble and replace. The filter keeps the robot clean while reducing the penetration of dust, pollen and other into the air you breathe. In order to achieve the best cleaning and filtering effect, the filter should be replaced every 2-3 months according to the use frequency. Colour:As shown Material:plastic Package Contents: 4 * roller 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.