NAPAVS47KT-1 | Napoleon Attic Vent Sleeve Assembly | 4" x 7"570441224SKU:AVS47KT-1Inventory ID:03569293Select Item:Price: $99.00Quantity: Napoleon 9" ID telescopic to 20" vent pipe shield and cover for attic installations on 4" and 7" venting. Reviews Choose your rating12345