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] 10" Diameter Engineered for easy installation Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Engineered for easy installation

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

+ Product Details Size - 24"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 18"h X 2"d (for duct opening measurement only)

making opening and closing a breeze

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] 10" Diameter Engineered for easy installation Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Engineered for easy installation actual front end outer dimensions are approximately 12 5 8" width X 8 5 8" height