Made of environmental protection material. Suitable for F8 NEX X20 Wireless Vacuum Cleaners. Depending on your household, it is recommended that you replace your part every 2 to 3 months. Regular replacement of your part helps your machine operate at efficiency. Colour: as shown Material: plastic Package Contents: 2 * 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.