12 in x 12 in x 11 1/2 in Actual Filter Size, 300 cfm Air Flow @ 300 fpm, HEPA Air Filter - 6B617|6B617 - Grainger
12 in x 12 in x 2 7/8 in Actual Filter Size, 300 cfm Air Flow @ 300 fpm, HEPA Air Filter - 19RR59|19RR59 - Grainger
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Amazon.com : Organic Air Filter - 12 Inch Hepa Filter : Household Vacuum Filters Upright : Patio, Lawn & Garden
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