RV and Home White Stamped Steel Floor Diffuser/Register with Damper 14" X 6" (Duct Opening Size) Outside Dimension 15.25"x 7.25" The listed size 8" x

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

The light weight and flexible HDPE Inner core makes installation and handling super easy

1/2" ID for high water flow

The Shark Industrial Safety System Kit is a commercial gas connector solution designed for movable foodservice equipment

The listed size 14" x 8" is for the inside duct opening measurement

RV and Home White Stamped Steel Floor Diffuser/Register with Damper 14" X 6" (Duct Opening Size) Outside Dimension 15.25"x 7.25" The listed size 8" xFirst 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 14w X 6h is for duct opening measurement only, actual outsize overall dimensions is 15. 25 wide by 7. 25 high. If your duct opening size is 14 x 6, this is the right size and will fit in well. If you measure outside or surface size,