20" x 4" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 22w X 6"h] Black actual front end outer dimensions

actual front end outer dimensions are approximately 36 5/8" width X 12 5/8" height

+ Product Details Size - 8"w X 30"h is the size for the duct opening measurement only

High Quality – Commercial grade aluminum - will never rust - designed for warehouses

actual front end outer dimensions are 17

Actual Filter Size – 33 3/4"w x 15 3/4" x 1"

20" x 4" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 22w X 6"h] Black actual front end outer dimensions+ Product Details Size 20"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are 22" width X 6" height. Design 180 degrees double direction adjustable fins are manually adjustable individually for optimal air distribution. High Quality Commercial grade aluminum will never rust designed for warehouses, factories, workshops, gymnasiums & restaurants Airflow Easy unrestricted airflow for your HVAC system.