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Part # A B C D E F
56980 3" 1-1/2" 1/16" 3" 3-9/16" 3-3/4"
56981 4" 1-3/4" 1/16" 4" 4-9/16" 4-5/16"
Duct for Cast Vents
56980 3" Duct for Cast Vent
56981 4" Duct for Cast Vent
Part # Inv.Class* Std.Pk. Material Notes
56980 B 24 PP + Calcium Carbonate Fits 56860 / 56861
56981 B 24 PP + Calcium Carbonate Fits: 56862 / 56863
* Indicates inventory availability
  1. Catalog items typically kept in stock and available for immediate shipment.
  2. Catalog items where inventory levels are determined by customer forecasts. May require lead time for new orders.
  3. Produced from custom tooling and stocked to purchase orders only.