By DuraVent

    DuraVent DuraBlack Increaser

    $78.20
    $78.20
    Diameter: 5 inch
    Length: Adjustable 5–6 inch
    $78.20
    $78.20

    DuraVent DuraBlack increaser in 5–9 inch diameters, adjustable sections. Each option is a DuraVent factory part number.

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