Generalaire 20x20x5 Part 4531 / 4556 Actual Size 19 5/8" x 20 5/8" x 4 15/16" With Foam Gaskets, MERV 10. Case of 3 Made in Canada by FurnaceFilters.Ca Frigidaire FCF250 Pre-Filters come with 1/4" removable

Pre-Filters come with 1/4" removable tension springs

more effective than 92X09

Actual Size 12" x 16" x 2 1/2"

Unique filter material will not degrade from exposure to UV light

Aprilaire 4785 Humidifier Maintenance Kit

Generalaire 20x20x5 Part 4531 / 4556 Actual Size 19 5/8" x 20 5/8" x 4 15/16" With Foam Gaskets, MERV 10. Case of 3 Made in Canada by FurnaceFilters.Ca Frigidaire FCF250 Pre-Filters come with 1/4" removableReplacement for Generalaire 4531, 20 x 20 x 5 Pleated Filters Actual Size 19 5 8" x 20 5 8" x 4 15 16" With Foam Gaskets MERV 10 Rated Also fits: S1 # S1 FM10202005, Source 1 # S1 MAC202005, Trion # 255649 103, Skuttle #448 3, Skuttle DB 0020 020, Air Bear Supreme 20x20, Generalaire MAC TWENTY, Generalaire #4531 Made in Canada by FurnaceFilters. Ca Case of 3