8"x 8" (Duct Opening Size) 3-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 9.75" X 9.75" The Listed size 12"x 2"

The Listed size 12"x 2" is for inside duct opening measurement

Actual outside measurement is 14" x 6"

If your duct opening size is 10” x 4”

you will feel either too cold or too hot

Actual outside measurement is 14" x 10"

8"x 8" (Duct Opening Size) 3-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 9.75" X 9.75" The Listed size 12"x 2"This steel stamp faced register is for sidewall or ceiling applications. The listed size 8"w X 8"h is for duct opening measurement only. Actual outside overall dimensions is 9. 75" wide by 9. 75" high. Difference between "inside" and "outside": Inside (duct opening) is the measurement you can see after taking the vent off the wall or ceiling. "outside" measurement is the surface you can see after the installation. Size selection guide: 1) take the