RV and Home Brown Stamped Steel Floor Diffuser/Register with Damper 10" X 3" (Duct Opening Size) Outside Dimension 11.5"x 4.5" The Listed size 14"x 6"

The Listed size 14"x 6" is for inside duct opening measurement

15" long heavy duty steel construction with white powder coating finish

Our plastic sidewall/ceiling register is made of ABS plastic in bright white

The Listed size 10"x 6" is for inside duct opening measurement

If you measure outside or surface size

RV and Home Brown Stamped Steel Floor Diffuser/Register with Damper 10" X 3" (Duct Opening Size) Outside Dimension 11.5"x 4.5" The Listed size 14"x 6"The Listed size 10"x 3" is for inside duct opening (the hole) measurement, actual outside dimension is 11. 5"x 4. 5" Butterfly damper with easy foot operated control dial for desired air flow Two sunk screw holes located at both sides of the register for ceiling and wall mounting with included screws Brown powder coating with matte finish Individually shrink wrapped with card board pad in the back for extra protection