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ATCO #030 is UL 181, Class 1 Air Ducts and is manufactured with a tri-directional fiberglass scrim r...
ATCO #031 is UL 181, Class 1 Air Ducts and is manufactured with a tri-directional fiberglass scrim r...
ATCO-500 series is a UL 181 Class 1 Air Connector which meets the requirements of NFPA (90A & 908)....