Hunter QuietFlo True HEPA Aftermarket Replacement Filter Fits Hunter models 30115, 30145, 30170, 30175, and 30185. * Measures approximately 10 1/2 x 15 1/2 x 1 5/8. * 99.97% effective at removing particles as small as .3 microns! * Captures allergy causing smoke, pollen, dust, mold, spores, pet dander, and other irritating allergens. * Last up to one year under continuous use.