14" X 8" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 9.75"H] fixed bar Built-In Locking System – Comes

Built-In Locking System – Comes with a permanently attached eight-tumbler lock and a supplied key for added security

+ Product Details Size - 20"w X 24"h is the size for the duct opening measurement only

Design – Heavy gauge steel

+ Product Details Size - 30"w X 26"h is the size for the duct opening measurement only

Mounted with a frame and bayonet joint

14" X 8" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 9.75"H] fixed bar Built-In Locking System – Comes+ Product Details Size 14"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are 15. 75" width X 9. 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