Our Accumulair 12x18x4 air filter is exactly made to be compatible with same sized 12x18x4 air filter specs. Pleated electrostatic charged media traps airborne particles relative to its MERV rating. Chemical free material. Notice: Example filter picture as shown is not to scale and is included to show style only. Current stock and 12x18x4 air filter variations last verified on 03/24/2020.
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