20" x 23" x 1" MERV 4 - Residential Washable Air Filter 32w Each filter lasts up to

Each filter lasts up to one month and should be changed and disposed of regularly

these will not cut your hands and feature a low pressure drop and high level of filtration

20" x 21 1/2" x 1" MERV 6 - Fiberglass Air Filter - 6 Pack

16" x 25" x 2" MERV 4 - Residential Washable Air Filter - 1 Pack

20" x 23" x 1" MERV 4 - Residential Washable Air Filter 32w Each filter lasts up to20" x 23" x 1" MERV 4 Residential Washable Air Filter 1 Pack Actual Dimensions: 20" x 23" x 3 4 These quality filters are built to last a lifetime. They are interchangeable with 1" disposable filters and can be used again and again. The secret behind the filter's performance is its patented stage loading peak and valley design. Instead of face loading (particles captured on the outer surface of the filter) the filter uses stage loading, with each