28"W X 6"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 29.875"W X 7.875"H] w24h24 Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 17 3/4" x 1"

+ Product Details Size - 14"w X 16"h is the size for the duct opening measurement only

75"H – fits a 16" X 4" duct opening

+ Product Details Size - 18"w X 18"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 12"h X 2"d (for duct opening measurement only)

28"W X 6"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 29.875"W X 7.875"H] w24h24 Actual Filter Size – 21+ Product Details Size 28"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 875" width X 7. 875" height. High Quality High quality aluminum with counter sunk screw holes (screws included) and no sharp edges. Design Unrestricted airflow For Your HVAC system noise free components no vibrating louvers etc. Powder Coat Finish Smooth, shiny, scratch resistant, beautiful. Looks like it was