FiltersFast Compatible Replacement for Trane Perfect Fit BAYFTFR21M 21" x 27" x 5" (Actual Size: 20 9/16 X 26 3/16 X 4 15/16) 2-Pack Dimensions: 21" x 27" x 5" (Actual Size: 20 9/16 X 26 3/16 X 4 15/16) MERV Rating: MERV 11 These filters also also replace the AFM210A0A10 and BAYFRAME210A 2-Pack For Added Convenience Made in the USA!