28"W X 8"H [Duct Opening] ALUMINUM RETURN GRILLE - Easy Air Flow - Linear Bar Grilles [Outer Dimensions: 29.875"W X 9.875"H] 18" Round Duct Pipe + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 30"w X 40"h is the size for the duct opening measurement only

This grill comes in four different designs

Powder-Coat Finish – smooth

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 10" OR 10" x 22" duct opening (measured at the opening)

+ Product Details Size – 20"w X 34"h is the size for the duct opening measurement only

28"W X 8"H [Duct Opening] ALUMINUM RETURN GRILLE Easy Air Flow Linear Bar Grilles [Outer Dimensions: 29.875"W X 9.875"H] 18" Round Duct Pipe + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 30"w X 40"h is the size for the duct opening measurement only This grill comes in four different designs