Kenmore Sears Progressive Foam Filter CF1, Progressive & Whispertone, Panasonic Vacuum Cleaners, 86883, 86880, 20-86883, 2086883, 8175084 (4 Filters) Envirocare Filters compatible to Sears Kenmore CF1 (CF-1) Progressive Double Layer Foam Filters. Designed by FilterBuy to fit Kenmore Progressive & Whispertone vacuum units. Replaces the following Kenmore part #'s: CF1, CF-1, 20-86883, 86883, 2086883, 4370616, 8175084, 20-40321, 2040321, 40321, and Ultracare Kenmore 610461 filters. Also replaces Panasonic Part #'s MCV9568 and AC37KAKTZ000.