18" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Compatible With Duct 8in Perforated steel grille for return

Perforated steel grille for return air flow

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

with actual outer dimensions of 16

+ Product Description Check out one of our most attractive and stylish grills

+ Product Details Size - 20"w X 6"h is the size for the duct opening measurement only

18" X 8" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Compatible With Duct 8in Perforated steel grille for return+ Product Details Size 18"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 10" 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