16" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling fixed bar actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 34 5/8" width X 30 5/8" height

Actual Filter Size – 19 3/4"w x 24 3/4" x 1"

+ Product Details Size – 40"w X 10"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 30 5/8" width X 32 5/8" height

+ Product Details Size – 6"w X 10"h is the size for the duct opening measurement only

16" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER HVAC Vent Duct Cover Sidewall or Ceiling fixed bar actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 34 5 8" width X 30 5 8" height Actual Filter Size – 19 3 4"w x 24 3 4" x 1"