Flanders PrecisionAire 10155.01202 E-Z Flow Air Filter, MERV 4, 20 x 20 x 1-Inch, 12-Pack $43.33 B005OPQSDY
E-Z Flow Air Filter, MERV 4, 20 x 24 x 1-Inch, 12-Pack $50.85 B008LR80O2
Flanders PrecisionAire 85756.011418 NaturalAire Micro Particle Red Pleat Air Filter (4 Pack), 14 x 18 x 1" $104.22 B01BGCMVAW
Flanders PrecisionAire 85756.011624 NaturalAire Micro Particle Red Pleat Air Filter (4 Pack), 16 x 24 x 1" B01BGCMXVE
Flanders PrecisionAire 85856.012122 NaturalAire Micro Particle Red Pleat Air Filter (2 Pack), 21 x 22 x 1" B01BGCNT4Y