"This Flagro USA Flexible Ducting is constructed of waterproof, heat- and cold-resistant fabric with enclosed wire helix for added support and air flow. U.S.A. Pipe Design Single wall, Length in. 12, Fuel Type Propane burning, Color Black, Pipe Diameter in. 12, Product Style Flexible ducting, Pieces qty. 1. Easy 2-pin connection with durable wear strip Works with Flagro USA indirect heaters, Item#s 24678, 24677, 24676, 24675, 24388, 24387, 24386 and 24535"
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