12" x 4" Floor Register HVAC Air Supply Grille - Heavy Duty Rigid Built - Plastic Never Rust Vent Duct Cover [Outer Dimensions: 14w X 6"h] Fixed Blades with Damper 4" X 10" Is The

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

See chart below:

as the multidirectional design ensures consistent temperature control

3/4" - 2981 PSI

12" x 4" Floor Register HVAC Air Supply Grille - Heavy Duty Rigid Built - Plastic Never Rust Vent Duct Cover [Outer Dimensions: 14w X 6"h] Fixed Blades with Damper 4" X 10" Is The12"w X 4"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 14" Width X 6" Height SEE IN DESCRIPTION HOW TO MEASURE A GRILLE Solid Construction Designed For Floor Use High Quality ABS Plastic Will Last Forever & NEVER RUST Foot Operated Opposed Blade Damper For Full Air Flow Control And Shutoff Multi Angled Fan Pattern Fins For Multi Directional AIr Distribution Throughout The Entire Room 12" x 4" Floor Register