16" X 25" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 18 5/8" X 27 5/8"] w34h34 + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 16"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 36"h is the size for the duct opening measurement only

these pipes offer easy handling

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

polished brass

16" X 25" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 18 5 8" X 27 5 8"] w34h34 + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 16"w X 34"h is the size for the duct opening measurement only + Product Details Size 30"w X 36"h is the size for the duct opening measurement only