16" X 16" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 17" Width X 17" Height] 8in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 38 5/8" height

providing a perfect fit for most standard thermostats

Actual Filter Size – 11 3/4"w x 23 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 18" or 18" x 8" duct opening (measured at the opening)

+ Product Details Size - 24"w X 6"h is the size for the duct opening measurement only

16" X 16" Aluminum Access Panel Gypsum Board/Sheet Rock Door For Wall / Ceiling Application (PUSH-LOCK DOOR) With Frame - [Outer Dimensions: 17" Width X 17" Height] 8in diameter actual front end outer dimensions+ Product Details Size 16" X 16" is the size for the drywall opening measurement only, actual front end outer dimensions are 17" width X 17" 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