20" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Material_Steel featuring a 6" round duct

featuring a 6" round duct opening

+ Product Details Size - 20"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 3

Built with rust-resistant aluminum and a scratch-resistant powder-coated finish

Actual Filter Size – 31 3/4"w x 7 3/4" x 1"

20" X 16" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Material_Steel featuring a 6" round duct+ Product Details Size 20"w X 16"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 18" 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