12" X 12" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 13" Width X 13" Height] Compatible With Duct 8in + Product Details Size –

+ Product Details Size – 8"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 8"w X 12"h is the size for the duct opening measurement only

Actual Filter Size – 25 3/4"w x 31 3/4" x 1"

+ Product Details Size - 16"w X 20"h X 2"d (for duct opening measurement only)

12" X 12" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 13" Width X 13" Height] Compatible With Duct 8in + 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 Strong and sturdy aluminum built to last and never rusts. Made with gypsum sheetrock for a seamless finish Design Aluminum frame material with sleek, shiny, durable white powder coat finish for an attractive look & moisture resistant to prevent mold & mildew buildup in indoor or outdoor