12" X 6" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 13.75"W X 7.75"H] 8" Round Duct Pipe + Product Details Size -

+ Product Details Size - 14"w X 4"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 9 3/4" x 1"

actual front end outer dimensions are approximately 12 5/8" width X 34 5/8" height

The first number in a grille size represents the width

Say goodbye to pest-related worries as the built-in back 1/2" mesh acts as a barrier against unwanted rodents like mice

12" X 6" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 13.75"W X 7.75"H] 8" Round Duct Pipe + Product Details Size -+ Product Details Size 12"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are 13. 75" width X 7. 75" height. Design Individually adjusting curved blades. Multi shutter damper with handle operator to adjust air flow. Screws Included High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds a