6" x 32" or 32" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 32.5"] 14" Diameter + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 18" or 18" x 12" duct opening (measured at the opening)

+ Product Details Size - 34"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are 7

Actual Front End Outer Dimensions Are 12" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

1/2" - 3119 PSI

6" x 32" or 32" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum White [Outer Dimensions: 8.5" X 32.5"] 14" Diameter + Product Details Perfect Fit 4 X 12 Is CRFG2028 Width_14in + Product Details Perfect Fit & Easy Sizing Designed for a 12" x 18" or 18" x 12" duct opening (measured at the opening) + Product Details Size 34"w X 14"h is the size for the duct opening measurement only