18" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w28h28 With HVAC Premium you get 4 X 12 Is CRFG2028 Width_14in

With HVAC Premium you get an extra measure of quality that will be visible to your family members and house guests

actual front end outer dimensions are approximately 12 5/8" width X 26 5/8" height

See our separate listing of T-Bar Supply Grilles

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and Diffusers

18" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER HVAC Vent Duct Cover Sidewall or Ceiling w28h28 With HVAC Premium you get 4 X 12 Is CRFG2028 Width_14in With HVAC Premium you get an extra measure of quality that will be visible to your family members and house guests actual front end outer dimensions are approximately 12 5 8" width X 26 5 8" height