Tamarack Cape BackDraft Damper Buy Page One Way Air Flow Valve Model Click on description for more information Your Cost Change quantity in your Shopping Cart. You can always remove items later. Cape BackDraft Damper Tamarack Cape Back Draft Damper 4 inch diameter - CBD4 $18.00  Tamarack Cape Back Draft Damper 5 inch diameter - CBD5 $19.00  Tamarack Cape Back Draft Damper 6 inch diameter - CBD6 $20.00  Tamarack Cape Back Draft Damper 7 inch diameter - CBD7 $23.00  Tamarack Cape Back Draft Damper 8 inch diameter - CBD8 $25.00    Our Return Policy Our Shipping Policy Return to Tamarack Start Page