20x23x4.25 (19.88x22.63x4.25) MERV 8 Aftermarket Carrier Replacement Filter (2 Pack) Carrier FILCCFNC0024 and FILBBFNC0024. 20" x 23" x 4 1/4" (nominal size) Carrier whole house media filter. Actual size (H) 19 7/8" x (W) 22 5/8" x (D) 4 1/4". Original box type design. This is an aftermarket filter.