10" X 4" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] w20h20 Actual Filter Size – 11 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Actual Filter Size – 11 3/4"w x 23 3/4" x 1"

actual front end outer dimensions are 15" Width X 15" Height

+ Product Details Size - 12"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 14 5/8" height

preventDefault()

10" X 4" [Duct Opening] 3 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] w20h20 Actual Filter Size – 11 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Actual Filter Size – 11 3 4"w x 23 3 4" x 1" actual front end outer dimensions are 15" Width X 15" Height