10" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Round Damper Ring these heavy-duty louvers are ideal

these heavy-duty louvers are ideal for use in attics

+ Product Details Size – 30"w X 16"h is the size for the duct opening measurement only

Crafted from robust 20-gauge steel

this filter grille never rusts and withstands long-term use in any environment

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

10" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Round Damper Ring these heavy-duty louvers are ideal+ Product Details Size 10"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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