This filter is designed to fit Kenmore amounts using a HEPA filter (86,889). Kenmore amounts are actually manufactured by Panasonic for Sears, so this filter fits all Panasonic amounts using a HEPA filter too. The HEPA filter is required for homes with allergies, respiratory problems. The acronym HEPA stands for High Efficiency Particulate Air ". These advanced filters are very important to update the empty today, as the army air through microscopic screens, capture even smaller particles such as dust mites, pollen, animal dander, and even the most bacteria. After 1 year of use (average homes, houses more sensitive should replace more often than once a year), these screens become clogged with microscopic particles, which forces the vacuum motor to work harder and harder to force the 's air through the filter. The more often you change these filters, the higher the vacuum last. Measurements of the filter, 6 "L x 3.85" W x 5 "H.