36" X 16" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 18 5/8"] Material_Steel + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 18"w X 20"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 9

+ Product Description When it's time to upgrade your HVAC Vents in your house

+ Product Details Size – 16" x 20" or 20" x 16" is the size for the duct opening measurement only

36" X 16" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 38 5 8" X 18 5 8"] Material_Steel + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 18"w X 20"h is the size for the duct opening measurement only + Product Details Size 32"w X 26"h is the size for the duct opening measurement only