FR400 Replacement Filter Compatible with Austin Healthmate FR400, HM400, HM402, HM405, HM410, HM450 Air Purifier, 1 High - Efficiency Filter + 2 Pre-Filters

["Perfectly Compatible:This FR400 filter is specifically designed to be compatible with Austin Healthmate, HM400, HM402, HM405, HM410, HM450 Air Purifier","4-layer filtration: a combination of 2 different pre-filters + high-efficiency filters + activated carbon, as small as 0.3 microns, intercepting particles, dust, pollen, pet dander, etc. in the air","Value Set: A 3-piece economical combination set that provides more long-lasting health protection. For optimal performance, it is recommended to replace the filter regularly","Professional Production Factory:From raw material selection to professional production operations, ensures the quality of the filter element and thereby provides health protection for you and your family","Buy with confidence: We have always been committed to providing all customers with high-quality and cost-effective air purifier filters to help you build a better living environment"]