30"W X 26"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 31.875"W X 27.875"H] 18" Diameter + Product Details Size – VF-WB 2x12 PB our damper helps create 6" Round Duct Pipe

+ Product Details Size – 14"w X 32"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 6" OR 6" x 26" duct opening (measured at the opening)

Actual Filter Size – 19 3/4"w x 11 3/4" x 1"

'block' : 'none'

+ Product Details Size - 30"w X 36"h X 2"d (for duct opening measurement only)

30"W X 26"H [Duct Opening] ALUMINUM RETURN GRILLE Easy Air Flow Linear Bar Grilles [Outer Dimensions: 31.875"W X 27.875"H] 18" Diameter + Product Details Size – VF WB 2x12 PB our damper helps create 6" Round Duct Pipe + Product Details Size – 14"w X 32"h is the size for the duct opening measurement only + Product Details Perfect Fit & Easy Sizing Designed for a 26" x 6" OR 6" x 26" duct opening (measured at the opening)