12" X 12" Universal Aluminum Access Panel Door For Wall / Ceiling Application (Push-Lock) With Solid Frame - [Outer Dimensions: 13" Width X 13" Height] 12" Round Duct Pipe + Product Details Size -

+ Product Details Size - 16"w X 6"h X 2"d (for duct opening measurement only)

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Actual Filter Size – 17 3/4"w x 17 3/4" x 1"

Plumbing Connections: Connect the inlet and outlet pipes securely

12" X 12" Universal Aluminum Access Panel Door For Wall / Ceiling Application (Push-Lock) With Solid Frame - [Outer Dimensions: 13" Width X 13" Height] 12" Round Duct Pipe + Product Details Size -+ Product Details Size 12" X 12" is the size for the drywall opening measurement only, actual front end outer dimensions are 13" width X 13" height High Quality High grade aluminum solid frame construction. Design Aluminum frame with no welded edges. Fully removable door with a spring loaded hinge. Open close easily with push lock technology, just push open and push close. Easy Access Provides easy access for HVAC, plumbing, electrical, crawlspace