Unfinished White Oak Flush (no/frame) Vent, 4 " X 10" (duct) Original style

The flush styling with a design uniqueness all its own. The louvers are widened for optimal airflow and the exterior frame is eliminated for a smaller overall size. Sets flat on the subfloor. May be installed permanently or as a lift out vent to permit cleaning of the duct throat. No damper option available, but the design allows a standard adjustable metal register to be installed on the subfloor.