6"W X 16"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 7.75"W X 17.75"H] Material_Steel Noise free components - no Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Noise free components - no vibrating louvers etc

actual front end outer dimensions are approximately 38 5/8" width X 22 5/8" height -

75" Deep - Will Fit All Garrage Doors - Insulated And Non Insulated Garrage Doors [The Hole In The Door SHould Be: 15 ¼ x 9 ¾]

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

positioning supply and return grills accordingly

6"W X 16"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 7.75"W X 17.75"H] Material_Steel Noise free components no Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Noise free components no vibrating louvers etc actual front end outer dimensions are approximately 38 5 8" width X 22 5 8" height