18" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling rg1010 5" - SEE BELOW IN

5" - SEE BELOW IN DESCRIPTION How To Measure A Grille

actual front end outer dimensions are approximately 10 5/8" width X 12 5/8" height

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height -

The integrated eight-tumbler lock system

Actual Filter Size – 17 3/4"w x 7 3/4" x 1"

18" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling rg1010 5" - SEE BELOW IN+ Product Details Size 18"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 14" height. High Quality High quality steel construction, no scuff powder coat durable finish, smooth, shiny, scratch resistant, no sharp edges, 2 recessed screw holes on each side with screws included, screws same color as vent cover, easy installation. Adjustable airflow control Adjustable airflow