HODSEUKIN Replacement Filter Kit Compatible with Austin Healthmate FR400, HM400, HM402, HM405, HM410, HM450 Air Purifiers,H13 Activated Carbon & Pre-Filter

["HODSEUKIN Replacement Filter Kit Compatible with Healthmate FR400 , HM400, HM402, HM405, HM410, HM450 Air Purifiers","Dual filtration design with activated coconut carbon layer.High-Efficiency filter Smoke, multiple Air particles filters","High-Efficiency Activated Carbon, filter All sorts of smells and smoke","Please replace regularly to keep your machine fresh， Recommended to change filter once every 6 months, Also the filter's usage time will depend on the environment air quality around you.","Energy saving air filters save energy due to a low-density design and requiring less pressure to push air through the filters"]