RV and Home White Stamped Steel Floor Diffuser/Register with Damper 10" X 4" (Duct Opening Size) Outside Dimension 11.5"x 5.5" The Listed size 20"x6" is

The Listed size 20"x6" is for inside duct opening measurement

actual outside dimension is 25

This product has listed size 14“w X 6”h is for duct opening measurement only

the second measurement) is the height(vertical measurement)

Do not measure the surface as registers/vents are measured by inside dimensions

RV and Home White Stamped Steel Floor Diffuser/Register with Damper 10" X 4" (Duct Opening Size) Outside Dimension 11.5"x 5.5" The Listed size 20"x6" isVersatile: 10x4 inch floor vent suitable for RVs and other applications. Durable Construction: Made from high quality materials for long lasting performance. Easy Installation: Designed for straightforward installation in various floor surfaces. Efficient Airflow: Allows proper ventilation and air circulation. Space Saving: Compact size maximizes usable floor space.