Honeywell HEPA air purifier filters are able to capture an impressive 99.7% of airborne particles at 0.3 microns from the air that passes through the filter. This package includes 1 Honeywell H filter. This HEPA filter is compatible with the HPA050, HPA060, HPA061, HPA150, HPA160, HHT055 and HHT155 series. It is highly recommended that you change this hepa air filter once a year for optimal performance. Establish an unrivaled breathing experience for yourself and your loved ones with Honeywell HEPA filters.