36"W X 6"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 37.875"W X 7.875"H] Ceiling 6" width X 7 4 X 12 Is CRFG2028 Width_14in

6" width X 7

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 20" OR 20" x 26" duct opening (measured at the opening)

strong aluminum construction with smooth finished edges for easy and safe use

+ Product Details Size - 24"w X 6"h Is The Size For The Duct Opening Measurement Only

actual front end outer dimensions are approximately 20 5/8" width X 8 5/8" height

36"W X 6"H [Duct Opening] ALUMINUM RETURN GRILLE Easy Air Flow Linear Bar Grilles [Outer Dimensions: 37.875"W X 7.875"H] Ceiling 6" width X 7 4 X 12 Is CRFG2028 Width_14in 6" width X 7 + Product Details Perfect Fit & Easy Sizing Designed for a 26" x 20" OR 20" x 26" duct opening (measured at the opening)