NUT-427 Please log in to see price or purchase this item Quantity discounts available QuantityPrice SKU: NUT-427 MANUFACTURER: Nutone Product Details Transition (thin wall), 4-1/2" x 18-1/2" to 10" Round . Product Details Back Product DetailsTransition (thin wall), 4-1/2" x 18-1/2" to 10" Round .