MH25 is a UL-181 Class 1 flexible air duct, manufactured with a heavy-duty black polyethylene vapor barrier, which is designed as a supply or return air duct used in manufactured housing and mobile home installations.
I purchased 3 boxes arrived in good condition and in a timely manner.
Easy and still.
Definite improvement over the old R4.2 👍
Got AC again!
FL
2 months ago
Verified Buyer
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