10" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 12 5/8" X 38 5/8"] w8h8 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 20"w X 10"h is the size for the duct opening measurement only

Quality Packaging – carefully shrink wrapped with cardboard backing to prevent damage in shipment

actual front end outer dimensions are approximately 34 5/8" width X 8 5/8" height

1-1/8" - 2334 PSI

1/4" - 6518 PSI

10" X 36" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 12 5 8" X 38 5 8"] w8h8 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 20"w X 10"h is the size for the duct opening measurement only Quality Packaging – carefully shrink wrapped with cardboard backing to prevent damage in shipment