Adapter | 4" x 7" to 4" x 6-5/8" | Napoleon | Duravent570438334SKU:NAPW175-0053Select Item:Price: $69.00Quantity: Converts 4"x 7" venting to 4" x 6 5/8" Dura Vent Napoleon Duravent Adapter 4 X 7 Reviews Choose your rating12345 Related ProductsHigh Temp Sealant | 700 Deg.$17.08Buy Now