Napoleon DuraVent Adapter | 4" & 7" to 4" & 6-5/8"570438334SKU:NAPW175-0053Select Item:Price: $90.00Quantity: Napoleon Duravent Adapter Converts 4" & 7" venting to 4" & 6 5/8" for use with DuraVent DirectVent Pro. Reviews Choose your rating12345 Related ProductsHigh Temp Sealant | 1050 Deg.$24.00Buy Now