20" X 20" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 21" Width X 21" Height] Material_Anodized Aluminum [Outer Dimensions: 16

[Outer Dimensions: 16

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making it adaptable to various airflow needs

maintaining their elegant

Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

20" X 20" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 21" Width X 21" Height] Material_Anodized Aluminum [Outer Dimensions: 16+ Product Details Size 20" X 20" is the size for the drywall opening measurement only, actual front end outer dimensions are 21" Width X 21" Height High Quality High grade steel construction. Flush Access Door Is a type of door or panel designed to provide access to concealed spaces, such as HVAC systems, electrical components, plumbing pipes, or other utility areas. Unlike traditional doors that have visible frames and hinges, a flush access door is