GREAT VALUE: This filter is a 3-in-1, combining a washable pre-filter for capturing of large particles, HEPA filter for trapping of tiny airborne particles, and carbon filter for assistance in the removal of unwanted unfavorable odors - A three-stage filtration process. 1 piece, 3-in-1 HEPA Drum Filter, Dimensions: 7.62' (OD) x 4.60' (ID) x 5.25' (H). COMPATIBILITY: Compatible with the TruSens Z-2000 Medium Air Purifier. Compatible with the Dupont 3-in-1 HEPA Drum Filter, Part AFHZ2000-01 MOST EFFICIENT: Designed to draw air from all directions (360-degree air intake), efficiently filtering the air in the environment, which results in more freshness to assist you in breathing easy. Washable pre-filter also offers the first layer of defense, ultimately extending the overall life of the HEPA filter. Foam gasket seal prevents leakage from in/out of the filter. USED BY PROFESSIONALS: LifeSupplyUSA Air Purifiers Filters are made to be durable & efficient for months. SAVE MONEY by ens