24" x 28" x 1" MERV 4 - Residential Washable Air Filter Residential Washable Air Filter:24" x 28" x 1" MERV 4 - Residential Washable Air Filter Each filter lasts up to

Each filter lasts up to 1 month and should be changed and disposed of regularly

16" x 20" x 2" Permanent Washable Air Filter - 1 Pack

Actual Dimensions: 30" x 30" x 3/4

30" x 36" x 1" MERV 4 - Residential Washable Air Filter - 1 Pack

24" x 24" x 1" Permanent Washable Air Filter - 1 Pack

24" x 28" x 1" MERV 4 - Residential Washable Air Filter Residential Washable Air Filter:24" x 28" x 1" MERV 4 - Residential Washable Air Filter Each filter lasts up to24" x 28" x 1" MERV 4 Residential Washable Air Filter 1 Pack Actual Dimensions: 24" x 28" 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