25 replacement filters exactly designed for 25 air purifier S1/W1/B1 models.The package includes 2 filters, and it's recommended to replace the filters every 3-4 months on both sides at the same time.
25 replacement flters are made of 3-in-1 filtration systems including Nylon Pre-Filter, H13 Medical Grade True HEPA Filter, and Activated Carbon Filter.
The 25 True HEPA filter are capable of attaching 99.99% of airborne particles as small as 0.01 microns, and the carbon filter helps you solve the problem of unpleasant odors and gases.
Package includes 2 filters. Fully meet your needs for the replacement of 25 filter, with premium materials and advanced technology, ideal solution for homes with pets, smokers, open layout kitchens.
We value customer service and satisfaction. If you have any problems with the filter fitting your air purifier, please contact us through our Amazon home page