We have 6 of these HEPA filters. New, in box. Only $10 each! Cash Only please! Sells for $23.00 at Home Depot. Description below from Home Depots website. Replacing the True HEPA filter for your Honeywell air purifier just got easier. The new permanent universal HEPA filter is made to fit Honeywell air purifiers 11520 series, 13520 series, 17200 series, 18150 series, and 5000 series. The Lifetime HEPA filter has the same round filter design with a new weave that allows for easy cleaning. All Honeywell True HEPA filters are 99.97% effective at capturing airborne particles as small as 0.3 microns such as dust, smoke, pollen, cat dander and mold spores from the air that passes through the filter. Simply determine the series air purifier you have and purchase the appropriate number of filters for your unit - Models 11520, 12520, 17200, 18150, 18155, 17400, 50150 50200, will require 2 filters and models 13520, 50250 will require 3 and model 50300 will require 4 filters. Each package contains a gasket for stacking multiple filters. * Universal replacement filters fit most Honeywell Enviracare Air Purifiers * Determine the series you have and order the corresponding number of filters * 99.97% filter efficiency * Easy to clean, simply vacuum 4 times a year * Contains one filter and one spacer * MFG Brand Name : Honeywell * MFG Model # : HRF-14 * MFG Part # : HRF-14 Location: Mililani/Waipio it's NOT ok to contact this poster with services or other commercial interests hawaii