10"x 10" (Duct Opening Size) 4-Way Stamped Face Steel Ceiling/sidewall Air Supply Register - Vent Cover - Actual Outside Dimension 11.75" X 11.75"

First 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 10“w X 10”h is for duct opening measurement only, actual outsize overall dimensions is 11.75” wide by 11.75” high. If your duct opening size is 10” x 10”, this is the right size and will fit in well. If you measure outside or surface size, you will get a large one and it will not fit.

• 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
• Four 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