6" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling White Actual Filter Size – 15

Actual Filter Size – 15 3/4"w x 31 3/4" x 1"

+ Product Details Size - 30"w X 20"h is the size for the duct opening measurement only

making it ideal for preventing tampering or unauthorized adjustments

For 6" Round Duct Opening - Spiral or Flex

+ Product Description Upgrade your HVAC system with our 6" Round Air Vent Supply Grille

6" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling White Actual Filter Size – 15+ Product Details Size 6"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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