12" Round Ceiling Diffuser White Powder Coated with Outside Dimension of 16" Fitting in 12" Duct This register fits in a

This register fits in a duct opening of 14”wide and 8”high

Whether you prefer to leave it fully open for optimal airflow or close it off completely to redirect extra heat or air conditioning to other rooms

Actual outside measurement is 16" x 8"

meticulously fashioned from heavy-duty 18-gauge steel to deliver unparalleled strength

15" long heavy duty steel construction with oil brushed powder coating finish

12" Round Ceiling Diffuser White Powder Coated with Outside Dimension of 16" Fitting in 12" Duct This register fits in aFirst 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 12'' X 12'' is for duct opening measurement only, actual outsize overall dimensions is 16'' X 16''. If your duct opening size is 12, this is the right size and will fit in well. If you measure outside or surface size, you will get a