FilterBuy 20x20x5 Honeywell Pleated AC Furnace Air Filters. AFB Silver MERV 8 (2 Pack) FilterBuy 20x20x5 Honeywell Replacement Furnace Filter / Air Filter - AFB Silver MERV 8 (2 Pack) Designed to fit Honeywell air cleaner model Honeywell F25, filter #203721. Honeywell F35 and F35R, filter # FC35A1019. Honeywell F100, & F150, Filter #FC100A1011, and Honeywell F200, Filter #FC200E1011. Pack of 2 filters. Nominal size 20x20x5. Actual size 19 3/4 x 19 7/8 x 4 3/8. MERV 8 - filters dust mites and debris. Great for everyday home use.