4" X 12" Mobile Home RV Floor Register Vent Grille with Back Dampers - Fixed Blades - 2 way Deflection - White Aluminum - Cube Core 1/2" White insulation will give

1/2" White insulation will give you a good R value of 3

this thermostat guard is compatible with most standard thermostat models

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+ Product Details Size - 34"w X 36"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 7

4" X 12" Mobile Home RV Floor Register Vent Grille with Back Dampers - Fixed Blades - 2 way Deflection - White Aluminum - Cube Core 1/2" White insulation will give+ Product Details Size 4"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 5. 5" X 13. 5" wider. Installation Location Floor. Design Rigid gauge built for durability and long life in mind, but still light and handy. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was just waxed. Quality Packaging Carefully shrink wrapped with cardboard backing to prevent damage