18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w26h26 Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 11 3/4" x 1"

actual front end outer dimensions are approximately 20 5/8" width X 34 5/8" height

actual front end outer dimensions are approximately 20 5/8" width X 36 5/8" height

These grilles and registers give you an extra measure of quality that are visible to your family members and house guests

and installation is quick and simple with the included screws

18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w26h26 Actual Filter Size – 21+ Product Details Size 18"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 8" 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