Amaircare 16 Inch ET Super Plus Annual Filter Kit with Formaldesorb VOC Canister Replacement air filter kit 93-A-16SP05-ET for 16 inch easy twist HEPA cartridge units 2016 Amaircare 3000 ET. Also use with WW350, AWW675, 7500, 10000, 6000V Cart, 7000 Cart, IS5000, IS5000 Cart, 4000 VOC Chem. Three Pre-filters foam , one Formaldezorb plus Carbon VOC Filter, One replacement O ring/gasket. Formerly the 94004181F. VOC canister filter with formaldesorb potassium permanganate is superior to standard VOC filters in removing Volatile Organic Compounds. VOC's are gasses and chemicals that are emitted in your home from objects and products like paints, household cleaning chemicals, furniture etc. Remember this combination of carbon plus potassium permanganate is superior at adsorbing odors and gasses. This item ships from a separate warehouse and may require extra time for delivery.