12" X 12" X 12" X 12" Duct Board Blind Reducer Box can used as a Tee Wye or Plenum Type Duct Box (Ma
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Duct Board Reducer can used as a Tee Wye or Plenum Type Duct Box (Make your own Duct Hole Size)
CAN ONLY HANDLE UP TO 10" DUCT BOARD COLLAR.
Made from Fiberglass Duct Board material
Use only duct board start collars with Duct Board Triangles to attach the ductwork.