• Manufacturer:  General Filters, Inc.
• Brand Name:   GeneralAire
• Description:   Generalaire 4557 Media Filters  (3-Pack)
• Part Number:   GF-4557
• Compatibility: MAC2000
• Nominal Size:  20" x 25" x 5"
• Actual Size: 19-5/8" x 24-3/16" x 4-15/16"
  
• Typical Filter Lifespan: 1 Year

Generalaire GF-4557 also fits:

• GeneralAire Mega-Mac MAC2000, MAC-L
• Lennox MAC-10, MF1-20
• Source1 S1-MAC10202505
• Totaline P101-MF20
• Trion Air Bear 435790-001, 435790-027, Air Bear 25x20 453000-001, Air Bear Grill Mount 2000 446672-004; Air Bear Supreme 2000 455602-001, Air Bear Right-Angle 447380-001, 447380-002, 447380-004, Son of a Bear 435790-048
• Ultravation 90-007, 90-008, 90-010• York S1-MAC10202505Typical