40"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 41.75"W X 21.75"H] w18h18 Crafted from high-quality red oak Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Crafted from high-quality red oak wood

+ Product Details Size - 36"w X 10"h is the size for the duct opening measurement only

our coils offer from 2300 to 6500 PSI

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

+ Product Details Size - 18"w X 32"h is the size for the duct opening measurement only

40"W X 20"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 41.75"W X 21.75"H] w18h18 Crafted from high quality red oak Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Crafted from high quality red oak wood + Product Details Size 36"w X 10"h is the size for the duct opening measurement only