8" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 10 5/8" X 20 5/8"] 18in diameter + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

5" - SEE BELOW IN DESCRIPTION How To Measure A Grille

and versatile for any project

actual front end outer dimensions are approximately 12 5/8" width X 12 5/8" height -

Our grilles feature a durable powder-coat finish

8" X 18" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 10 5 8" X 20 5 8"] 18in diameter + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 16"w X 36"h is the size for the duct opening measurement only 5" SEE BELOW IN DESCRIPTION How To Measure A Grille