29" X 22" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 31 5/8" X 24 5/8"] 18" Diameter + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 22"w X 30"h is the size for the duct opening measurement only

2" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

4" X 12" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

+ Product Details Size – 16"w X 24"h is the size for the duct opening measurement only

75" width X 26

29" X 22" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 31 5 8" X 24 5 8"] 18" Diameter + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 22"w X 30"h is the size for the duct opening measurement only 2" X 10" Brass Victorian Floor Register Grille Modern Contempo Decorative Grate HVAC Vent Duct Cover Brass Plated