Product: Flanders PrecisionAire 10155.012030 E-Z Flow Air Filter, MERV 4, 20 x 30 x 1-Inch, 12-Pack
Brand: Flanders
Pack of 12 disposable UL Class II rated air filters designed for protection of furnace and central air units
MERV 4 rating: Removes household dust, pollen, and lint
Continuous chipboard design guards against corner separation while the one-sided metal media retainer adds to the filter strength
Each filter maintains efficiency for up to 30 days
Compatible with HVAC systems requiring filters sized 20" x 30" x 1"

Search query: 20 by 30 by 1 air filter
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