25 Replacement Filters Compatible with MA Series 25 Air Purifier B1/S1/W1, 3 in 1 H13 True HEPA Activated Carbon Filters

COMPATIBILITY: model 25 replacement filters exactly designed for MA series air purifier S1/W1/B1 models. | 3-STAGE FILTRATION: Model 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. | SUPER FILTER CAPACITY: The filter can remove 99.97% of impurities, providing you and your family with a comfortable environment | PACKAGE: The package include 4 pack replacement filters compatible with MA series model 25 B1/S1/W1 | TIPS: It's recommended to replace the filters every 3-4 months on both sides at the same time.