RV and Home White Stamped Steel Floor Diffuser/Register with Damper 14" X 6" (Duct Opening Size) Outside Dimension 15.25"x 7.25" There are two screw holes

There are two screw holes on each side of the register to fix on the surface of wall or ceiling

Distance between the centers of two screws is 11"

The Listed size 14"x24" is for inside duct opening measurement

It perfectly match all colors of vents

Duct opening – a hole that holds the duct neck to allow air to come out from HVAC system

RV and Home White Stamped Steel Floor Diffuser/Register with Damper 14" X 6" (Duct Opening Size) Outside Dimension 15.25"x 7.25" There are two screw holesFirst 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 14w X 6h is for duct opening measurement only, actual outsize overall dimensions is 15. 25 wide by 7. 25 high. If your duct opening size is 14 x 6, this is the right size and will fit in well. If you measure outside or surface size,