10" x 4" Floor Register HVAC Air Supply Grille - Heavy Duty Rigid Built - Plastic Never Rust Vent Duct Cover [Outer Dimensions: 12w X 6"h] Color_R-4.2 Yellow By means of the smooth

By means of the smooth surface

Pressure Rating: 2100 to 7000 PSI

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

How to Measure Your Vent Hole Before Ordering a Grille

10" x 4" Floor Register HVAC Air Supply Grille - Heavy Duty Rigid Built - Plastic Never Rust Vent Duct Cover [Outer Dimensions: 12w X 6"h] Color_R-4.2 Yellow By means of the smooth10"w X 4"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 12" 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 10" x 4" Floor Register