Filter Queen Defender 4000 HEPA replacement filter
Filter Queen replacement HEPA filter, fits Filter Queen Defender 4000. This filter measures approximately 8 H x 7 1/2 ID x 11 1/4 OD. This is a HEPA filter and is 99.97% effective at removing particles as small as .3 microns from the air that passes through the filter. For optimum performance, replace filter every 12 months.