21 1/4" x 23 1/4" x 1" MERV 4 - Residential Washable Air Filter 21-5w Filtration Group's pleated air filter

Filtration Group's pleated air filter is made of 100% Synthetic Media which will not promote mold or bacteria growth and has the following features: MERV 8 efficiency

Dust & Lint

Actual Dimensions: 16" x 22" x 3/4

Pet Dander

Actual Dimensions: 14" x 25" x 3/4

21 1/4" x 23 1/4" x 1" MERV 4 - Residential Washable Air Filter 21-5w Filtration Group's pleated air filter21 1 4" x 23 1 4" x 1" MERV 4 Residential Washable Air Filter 1 Pack Actual Dimensions: 21. 25" x 23. 25" 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