20" X 20" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 21" Width X 21" Height] w36h36 + Product Details Size - RG1620AL Quality Packaging carefully packaged 8 Feet Long

+ Product Details Size - 20"w X 32"h X 2"d (for duct opening measurement only)

+ Product Details Size - 28"w X 36"h X 2"d (for duct opening measurement only)

+ Product Details Size - 18"w X 20"h is the size for the duct opening measurement only

much more than the required 700 psi for r410

20" X 20" Aluminum Access Panel Gypsum Board Sheet Rock Door For Wall Ceiling Application (PUSH LOCK DOOR) With Frame [Outer Dimensions: 21" Width X 21" Height] w36h36 + Product Details Size RG1620AL Quality Packaging carefully packaged 8 Feet Long + Product Details Size 20"w X 32"h X 2"d (for duct opening measurement only) + Product Details Size 28"w X 36"h X 2"d (for duct opening measurement only)