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 10" x

The listed size 10" x 8" is for the inside duct opening measurement

actual outsize overall dimensions is 15

Comply with ASME A112

If the duct opening is 14 x 8

Easy Installation: Designed for straightforward installation in various floor surfaces

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 10" xThis 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