Made of high quality material, more durable. HEPA filter is made of high-strength environmental-friendly materials, which can block most of dust down to 0.3 micrometer. As part of normal maintenance, it can be easily removed and replaced It is recommended that you replace spare parts every 2 to 3 months depending on the frequency of use to keep the machine running at its best performance The powerful cleaning function makes household cleaning more time-saving and labor-saving. It is suitable for a of floors such as ceramic tiles, marble, and wood floors. Product name:roller brush, filter Compatible models:for D3, for SPEEDFOX Nano NanoPro Product weight:filter screen 35g/pc :6 Pcs Colour:Black & White Material:plastic Size:Filter screen:72x68x56mm Package Contents: 6 * Hepa Filter Only the above package content, other products are not included. Note: Light reflection 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.