8" x 6" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Outside Dimension 10" x 8") actual outside dimension is 14

actual outside dimension is 14

The listed size 8" x 4" is for the inside duct opening measurement

Width vs Height The first measurement in a return grille size is the width(horizontal measurement)

•Multi-shutter damper with easy handle to adjust desired amount of air flow

• Protective Yellow Epoxy Coating – Smooth epoxy coating helps protect the connector from corrosion

8" x 6" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Outside Dimension 10" x 8") actual outside dimension is 14First 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 8w X 6h is for duct opening measurement only, actual outsize overall dimensions is 10 wide by 8 high. If your duct opening size is 8 x 6, this is the right size and will fit in well. If you measure outside or surface size, you will get