18" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 20 5/8" X 20 5/8"] fixed bar this flex duct decreases the Product Details Size 14 CRG828 7" Round Duct Pipe

this flex duct decreases the pressure loss and provides a more hygienic environment

+ Product Details Size - 14"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height

Powder-Coat Finish – Smooth

/* more inner breathing room */ border-radius: 6px

18" X 18" Steel Return Air Filter Grille for 1" Filter Removable Frame * Filter Included * [Outer Dimensions: 20 5 8" X 20 5 8"] fixed bar this flex duct decreases the Product Details Size 14 CRG828 7" Round Duct Pipe this flex duct decreases the pressure loss and provides a more hygienic environment + Product Details Size 14"w X 26"h is the size for the duct opening measurement only