12" x 8" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Listed Size is for Duct Opening or Inside Measurement) "outside" measurement is the surface

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

this ingenious feature prevents the loss of jewelry or small personal items that might otherwise slip through the vents and vanish into the ductwork

Outside overall dimension is 16”wide and 10”high

Easy installation for home laundry room water supply lines

just name a few

12" x 8" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Listed Size is for Duct Opening or Inside Measurement) "outside" measurement is the surfaceFirst 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