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 12" x

The listed size 12" x 10" is for the inside duct opening measurement

EASY INSTALLATION: Simply adjust the length to the each side of metal vents and place them firmly on the frame surface

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

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

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 12" xThe 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