12" x 8" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Listed Size is for Duct Opening or Inside Measurement) just name a few

just name a few

"outside" measurement is the surface you can see after the installation

Simple roundflow design for smooth air flow

Easy installation for home laundry room water supply lines

Outside overall dimension is 16”wide and 10”high

12" x 8" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Listed Size is for Duct Opening or Inside Measurement) just name a fewFirst 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 12w X 8h is for duct opening measurement only, actual outsize overall dimensions is 14 wide by 10 high. If your duct opening size is 12 x 8, this is the right size and will fit in well. If you measure outside or surface size, you will