16" x 3" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 18w X 5"h] Insulated Line Set actual front end outer dimensions Suitable for all AC 8in diameter 12125SDCLNGBX

actual front end outer dimensions are 19" Width X 13" Height

actual front end outer dimensions are approximately 20 5/8" width X 22 5/8" height -

+ Product Description Enhance your HVAC system with our Aluminum Return Filter Linear Bar Grille

+ Product Details Size - 28"w X 20"h is the size for the duct opening measurement only

16" x 3" Aluminum Spiral Duct Air Vent Grille Cover Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 18w X 5"h] Insulated Line Set actual front end outer dimensions Suitable for all AC 8in diameter 12125SDCLNGBX actual front end outer dimensions are 19" Width X 13" Height actual front end outer dimensions are approximately 20 5 8" width X 22 5 8" height