20x20x5 (20.75x20.25x5.25) MERV 11 Aftermarket Five Seasons Replacement Filter (2 Pack) Five Seasons filter part # CMF2020 and P102-MF14B Nominal size 20 x 20 x 5. Actual size (H) 20 3/4 x (W) 20 1/4 x (D) 5 1/4. Package contains 2 filters. This is an aftermarket filter.