2300E Series Replacement Filter: Designed for and compatible with the Kenmore PM4030 air purifier. Check manual and machine to ensure proper fit. 3-Stage Filtration: Noticeably reduce the amount of dust in your room with a True HEPA filter capturing 99.97% of airborne dust down to 0.3 microns Easy Maintenance: Effortlessly switch out your Kenmore True HEPA filter after six months of powerful purification Includes: Two True HEPA filters