Support Dropshipping and Wholesaling.100% Original and Good Quality with Free After-sale Warranty.Used in conjunction with the HEPA filter, placed on the front of the HEPA filter, can effectively extend the life of the HEPA filter. Filter dust, PM2.5, etc.The pre-filter used in the filter sof the product purifier effectively increases the service life of the filter, so that the filter of your home can truly reach the service life marked by the manufacturer.Modified air purifiers for household air conditioners, fans, air circulation fans, air conditioners, exhaust fans, fans, etc., filter pm2.5 efficiency up to 95%.It is white, soft, non-toxic and odorless. It can be washed 1 or 2 times. Remember not to rub hard when washing.Good working condition, improves the air quality well.Electrostatic electret filter using 3D acupuncture process, less wind resistance, cleanability. Effectively extend the filter life of three to five times.For xiaomi air purifier 2 / 1 / Other brands of air purifier, air conditioning dust, central air conditioning inlet, windows, dust, anti-fog, etc.size: about 68*30cmMaterial:cottonColour:WhitePackage Contents:9 * filter cottonOnly 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