Amaircare 8 Inch ET Super Plus Annual Filter Kit with VOC Canister and 3 Carbon Pre-Filters Replacement air filter kit 93-A-08SP02-ET is used only with the Amaircare 2500 with the 8 inch easy twist HEPA filter cartridge. Amaircare Replacement Super Plus Annual Air Filter Kit 93-A-08SP02-ET Includes Two Types of Filters Three Stage One Foam Filter 1/8 Foam Prefilter Check every three months, vacuum or hand wash. Replace every year. One Stage ThreeVOC Filter Granulated Carbon pellets encased in steel mesh canister 1705 g = 1,875,500 m2 adsorption surface are One replacement O ring/gasket VOC canister filter is superior to standard VOC filters in removing Volatile Organic Compounds. 100% Carbon. VOC's include gasses and chemicals emitted in your home from objects and products like paints, household cleaning chemicals, furniture etc. All carbon removes most common chemicals and odors. This item ships from a separate warehouse and may require extra time for delivery.