24" x 6" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 26w X 8"h] Compatible With Duct 12in + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 26"w X 18"h is the size for the duct opening measurement only

ensuring a perfect fit

The total outer size of this grille is the listed size

+ Product Details Size – 20"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 32 5/8" height

24" x 6" Aluminum Spiral Duct Air Vent Grille Cover Fully Adjustable Double Deflection HVAC Air Supply [Outer Dimensions: 26w X 8"h] Compatible With Duct 12in + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 26"w X 18"h is the size for the duct opening measurement only ensuring a perfect fit