Aftermarket filter and carbon wrap pre-filter to fit Filter Queen Defender Air Purifier 4000 HEPA Includes One Filter and One Prefilter Wrap High Quality Aftermarket Parts by GoodVac. Replaces Genuine Part Numbers: 5404011300, 4404009100 Filter Dimensions - 8 inches high, 7 and 1/2 inches inside diameter 11 and 1/4 inside diameter Removes 99.97 % of particles as small as .3 micron