20" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 22 5/8" X 18 5/8"] w6h6 actual front end outer dimensions

actual front end outer dimensions are approximately 9

For 14" Round Duct Opening - Spiral or Flex

Actual Filter Size – 13 3/4"w x 33 3/4" x 1"

+ Product Description Check out one of our most attractive and stylish grills

+ Product Details Size - 40"w X 6"h is the size for the duct opening measurement only

20" X 16" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 22 5/8" X 18 5/8"] w6h6 actual front end outer dimensions+ Product Details Size 20"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 5 8" width X 18 5 8" height Actual Filter Size 19 3 4"w x 15 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.