Aerostar 20x25x5 MERV 8 Honeywell Replacement Pleated Air Filter, Made in the USA, 2-Pack Nominal: 20 x 25 x 5 or 20x25x5, ac furnace air filter Nominal size: 20 x 25 x 5, actual size: 20" x 24 3/4" x 4 3/8" Comparable to filtrate mpr 600 dust reduction Replaces Lennox Part Number: X0586, X5426, X6661, X6673, X6675, X7751, BMAC-20C, HCC20-28, HCF20-10, HCF20x16