20" X 20" Aluminum Insulated Fire Resistant Access Panel Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 21" Width X 21" Height] 10in diameter High Quality Aluminum The premium

High Quality Aluminum The premium durable Aluminum will Never Rust and it will never wear through leaving the material

+ Product Description Improve your HVAC system with our high-quality

Superior Airflow Control: Built-in damper lets you control how much air enters your room

+ Product Details Size – 36"w X 16"h is the size for the duct opening measurement only

20" X 20" Aluminum Insulated Fire Resistant Access Panel Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 21" Width X 21" Height] 10in diameter High Quality Aluminum The premium+ 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 Strong and sturdy aluminum built to last. Design Aluminum material & color to give your space an attractive look & provide high durability corrosion protection no rust. Built in tumbler lock and key is provided Easy Access Provides easy access for HVAC, plumbing, electrical, crawlspace etc.