10"x 6" (Duct Opening Size) 1-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 7.75" overall outside dimension is 20

overall outside dimension is 20

Butterfly damper with easy foot operated control dial for desired air flow

Simple round flow design for smooth air flow

actual outside dimension is 19

6” wide by 5

10"x 6" (Duct Opening Size) 1-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 7.75" overall outside dimension is 20First 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 10w X 6h is for duct opening measurement only, actual outsize overall dimensions is 11. 75 wide by 7. 75 high. If your duct opening size is 10 x 6, this is the right size and will fit in well. If you measure outside or surface size,