Aerostar 16x25x5 MERV 13 Honeywell Replacement Pleated Air Filter, Made in the USA, 2-Pack Nominal: 16 x 25 x 516x25x5, ac furnace air filter Nominal size: 16 x 25 x 5, actual size: 15 7/8" x 24 3/4" x 4 3/8" Comparable to filtrate mpr 1500 and 1550 ultra allergen defense Replaces Lennox part number: X0583, X8306, X6672