20" X 20"Universal Aluminum Access Panel Door For Wall / Ceiling Application (Push-Lock) With Solid Frame - [Outer Dimensions: 21" Width X 21" Height] Compatible with Duct 6" actual front end outer dimensions

actual front end outer dimensions are 19" Width X 19" Height

You are missing out on healthier breathing and life

Higher value MERV rating equates to finer filtration

+ Product Details Size - 18"w X 32"h is the size for the duct opening measurement only

and wildlife

20" X 20"Universal Aluminum Access Panel Door For Wall / Ceiling Application (Push-Lock) With Solid Frame - [Outer Dimensions: 21" Width X 21" Height] Compatible with Duct 6" 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 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