This Filter Hut Accumulair 19x21x4 air filter is specifically constructed to be compatible with same sized 19x21x4 air filter specification. Pleated electrostatically charged filter media traps contaminants according to the MERV specification. Chemical free material. Notice: Example filter image shown is not the actual dimensions and is shown for design only. Current stock and 19x21x4 air filter variations current as of 03/24/2020.
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