The Honeywell 20500 Replacement Air Cleaner HEPA Filter comes remarkably close when the issue is elimination of air particles as small as 0.3 microns. Compatible with Honeywell models 10500, 17000 and 17005, the Honeywell 20500 Replacement Air Cleaner HEPA Filter is rated 99.97 percent effective at eliminating irritating air pollutants that size and larger. And the Honeywell 20500 doesn't just move those damaging air particles around, it wipes them out completely, whether it's dust, mold spores, pet dander or something else foul floating through your household air cycle.SpecificationsDimensions: 12" H x 7" W x 12" L Weight: 6 lbs