14" X 8" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 16 5/8" X 10 5/8"] Supply Grille + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 4"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 20"h is the size for the duct opening measurement only

5" - SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Product Details Size – 22"w X 29"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

14" X 8" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 16 5 8" X 10 5 8"] Supply Grille + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 4"w X 16"h is the size for the duct opening measurement only + Product Details Size 32"w X 20"h is the size for the duct opening measurement only