20x25x4 Air Filter by Glasfloss 3. Thickness_4 19-7/8" x 21-1/2" x 1"

19-7/8" x 21-1/2" x 1"

Not a replacement for Honeywell Filters

FXM4X3600A

FEM2X4800A

Protect your HVAC system with Glasfloss GDS 12x30x1 disposable furnace filters

20x25x4 Air Filter by Glasfloss 3. Thickness_4 19-7/8" x 21-1/2" x 1"Product Details Glasfloss Air Filters are an excellent choice for any air conditioning system and are the ones used by the professionals. They are manufactured right here in Florida, by Floridians. Each air filter uses filter media that is made from 100% synthetic material that will not support microbial growth and does not absorb moisture. The media is supported by a galvanized, expanded metal backing that resists rust and corrosion. The filter frame