24" X 36" or 36" X 24" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 25.75 X 37.75] 10 Feet Long actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

actual front end outer dimensions are approximately 26 5/8" width X 12 5/8" height -

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

width: 100%

+ Product Details Size & Compatibilty - The 18" to 16" round metal pipe reducer & increaser 30 gauge is compatible with duct 18" to 16"

+ Product Details Size - 26"w X 12"h X 2"d (for duct opening measurement only)

24" X 36" or 36" X 24" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 25.75 X 37.75] 10 Feet Long actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 actual front end outer dimensions are approximately 26 5 8" width X 12 5 8" height + Product Details Size 16"w X 24"h is the size for the duct opening measurement only