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

• Standard Gas Fittings – Features 5/8" OD connector with 3/4" MIP x 3/4" FIP fittings for secure and compatible connections

you will get a large one and it will not fit

and long-term performance

Individually packed with cardboard box for ultra protection

The distance between centers of holes is 11"

If your duct opening size is 12” x 6”

standard 3/8" female x 3/8" male flare fittings

This product has listed size 10“w X 10”h is for duct opening measurement only

actual outside dimension is 12" X 10"

this is the right size and will fit in well

If your duct opening size is 12” x 8”

This added protection extends the lifespan of the connector while maintaining dependable performance in demanding environments