RV and Home White Stamped Steel Floor Diffuser/Register with Damper 12" X 2" (Duct Opening Size) Outside Dimension 13.5"x 3.75"

RV and Home White Stamped Steel Floor Diffuser/Register with Damper 12" X 2" (Duct Opening Size) Outside Dimension 13.5"x 3.75"

The Listed size 12"x 2" is for inside duct opening measurement, actual outside dimension is 13.5"x 3.75" 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. Distance between the two screw holes is 13.25". White powder coating with matte finish Individually shrink wrapped with card board pad in the back for extra protection First thing to know about size selection: take the vent cover off the wall or ceiling. Measure the duct opening where the vent can fit in. Use the measurement to determine right size to buy. This product has listed size 12“w X 2”h is for duct opening measurement only, actual outsize overall dimensions is 13.75“ wide by 3.75” high. If your duct opening size is 12” x 2”, this is the right size and will fit in well. If you measure outside or surface size, you will get a large one and it will not fit.