18" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w10h10 High Quality – Solid rigid

High Quality – Solid rigid steel body for durability and reliability

+ Product Details Size - 34"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 6" x 30" or 30" x 6" is the size for the duct opening measurement only

Actual Filter Size – 11 3/4"w x 25 3/4" x 1"

Just run your finger along the edge of the top plate and you’ll find a smooth finished surface

18" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling w10h10 High Quality – Solid rigid+ Product Details Size 18"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 6" 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