This accessory kit is compatible for Lefant M571 robot vacuum cleaners.Use: Accessories can be installed without tools.Maintenance tips: In order to maintain the best performance of the Lefant robot vacuum cleaner, please clean the brush and filter frequently, and replace it every 2-3 months according to the frequency of use.Colour: blackMaterial: plasticSize: Main brush is about 165x40mmPackage Contents:1 * Roller Brush4 * Side BrushOnly 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.