12"w X 6"h [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] w18h18 actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 16 5/8" width X 20 5/8" height

Actual Filter Size – 7 3/4"w x 9 3/4" x 1"

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

Actual Filter Size – 19 3/4"w x 21 3/4" x 1"

All steel wire is applied between PET surfaces to prevent corrosion (oxidization)

12"w X 6"h [Duct Opening] 3 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] w18h18 actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 16 5 8" width X 20 5 8" height Actual Filter Size – 7 3 4"w x 9 3 4" x 1"