10"x 4" (Duct Opening Size) 3-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 5.75" Do not use outside measurement

Do not use outside measurement for size selection or it would be too bit to fit

actual overall outside dimension is 26

Easy Installation: Our vent register is designed for hassle-free installation – no tools or prior experience required

The Listed size 12"x12" is for inside duct opening measurement

Simple round flow design for smooth air flow

10"x 4" (Duct Opening Size) 3-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 5.75" Do not use outside measurementThe Listed size 10"x 4" is for inside duct opening measurement, actual outside dimension is 11. 75" X 5. 75" Stamped Face Steel Construction with 1 2" fin spacing for high air flow Three Way Air Flow deflection Design Multi shutter damper with easy handle to adjust desired amount of air flow Individually shrink wrapped with card board pad in the back for extra protection