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] flat stamped steel actual front end outer dimensions

actual front end outer dimensions are approximately 38 5/8" width X 10 5/8" height

+ Product Details Size – 28"w X 6"h is the size for the duct opening measurement only

HVAC systems

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 6" duct openings

Solid Base Construction – Features a solid base for stable installation and reliable protection

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] flat stamped steel actual front end outer dimensions+ Product Details Size 20" X 20" is the size for the drywall opening measurement only, actual front end outer dimensions are 21" width X 21" 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