10"x 10" (Duct Opening Size) 3-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 11.75" The Listed size 12"x 8"

The Listed size 12"x 8" is for inside duct opening measurement (the duct hole)

White powder coating with matte finish

actual outside dimension is 19

actual outsize overall dimensions is 12''X12''

The listed size 10" x 4" is for the inside duct opening measurement

10"x 10" (Duct Opening Size) 3-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 11.75" The Listed size 12"x 8"The Listed size 10"x 10"is for inside duct opening measurement, actual outside dimension is 11. 75" X 11. 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