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    Master Flow 3-1/4 in. x 10 in. Rectangular Appliance Wall Vent

    Master Flow 3-1/4 in. x 10 in. Rectangular Appliance Wall Vent

    The Master Flow 3-1/4 in. x 10 in. Rectangular Appliance Wall Vent is designed to fit most range hoods that will be vented outside through a wall. This heavy-duty wall vent is made of zinc-coated galvanized steel. This wall vent features a spring... more

    $46.75

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    2Pc Master Flow 4 in. H X 4 in. W X 12 in. L White Resin Undereave Vent

    2Pc Master Flow 4 in. H X 4 in. W X 12 in. L White Resin Undereave Vent

    Master Flow offers a full line of easy-to-install options for providing critical intake ventilation at the soffit or undereave portion of the roof. more

    $30.48

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    Master Flow 10 in. x 4 in. to 6 in. 90-Degree Register Box

    Master Flow 10 in. x 4 in. to 6 in. 90-Degree Register Box

    The Master Flow 10 in. x 4 in. x 6 in. 90°Register Box creates a right-angle transition from round pipe or insulated flexible duct to an air register. This box is made of galvanized steel. It can be installed with sheet metal screws. It is suitable... more

    $21.26

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    Master Flow 4 in. H X 16 in. W X 16 in. L Galvanized Mill Aluminum Undereave Vent

    Master Flow 4 in. H X 16 in. W X 16 in. L Galvanized Mill Aluminum Undereave Vent

    Master Flow offers a full line of easy-to-install options for providing critical intake ventilation at the soffit or undereave portion of the roof. more

    $29.11 $26.01

    FREE shipping

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    Master Flow 4 in. H X 18 in. W X 18.5 in. L Black Resin Roof Vent

    Master Flow 4 in. H X 18 in. W X 18.5 in. L Black Resin Roof Vent

    Master Flow resin square-top utility vent is designed for attic ventilation. The fully enclosed hood deters rodent and insect infiltration and leaf and pine needle clogging. more

    $41.99 $38.54

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    Master Flow 12 in. x 2-1/4 in. to 6 in. Universal Register Box

    Master Flow 12 in. x 2-1/4 in. to 6 in. Universal Register Box

    This Master Flow 12 in. W x 2-1/4 in. L x 6 in. Dia Universal Register Box is ideal for creating a straight in-line transition from a round pipe to an air register. Insulate ductwork for system efficiency and comfort. Galvanized steel construction... more

    $19.99

    FREE shipping

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    More information about Building Supplies

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