Galvanized Bellmouth Spin In's for Ductboard with Damper #9400 SKU 9404 Product Details | Specifications | Check Inventory Please select 4" B/M DB-DAMPER SPIN 25/CTN 6" B/M DB-DAMPER SPIN 24/CTN 7" B/M DB-DAMPER SPIN 16/CTN 8" B/M DB-DAMPER SPIN 8/CTN 9" B/M DB-DAMPER SPIN 6/CTN 10" B/M DB-DAMPER SPIN 6/CTN 12" B/M DB-DAMPER SPIN 1/CTN 14" B/M DB-DAMPER SPIN 1/CTN 16" B/M DB-DAMPER SPIN 1/CTN Log in to view price