COMPATIBILITY: These model 15 replacement filters, compatible with the MA air puri-fier 15 series S1/W1, measure 9 3/4" x 5 1/8" x 1" (9.75" x 5.125" x 1"). COST EFFECTIVE PACKAGING: The package include 2 pack model 15 replacement filters compatible with MA series model 15 S1/W1. Half the price for exactly the same effect 3-STAGE FILTRATION: These model 15 replacement filters use a three-stage filtration system, which can more effectively remove dust, impurities, and odors SUPER FILTER CAPACITY: The filter can remove 99.97% of impurities, providing you and your family with a comfortable environment SUGGESTION: We recommend replacing the filter every 3-4 months or when the air purifier's replacement cartridge light turns red, please replace the cartridge in time COMPATIBILITY: These 15 replacement filters compatible with MA air puri-fier 15 series S1/W1

COST EFFECTIVE PACKAGING: The package include 4 pack 15 replacement filters compatible with MA air puri-fier 15 S1/W1. Half the price for exactly the same effect

3-STAGE FILTRATION: These 15 replacement filters use a three-stage filtration system, which can more effectively remove dust, impurities, and odors

SUPER FILTER CAPACITY: The filter can remove 99.97% of impurities, providing you and your family with a comfortable environment