20" X 20"Universal Aluminum Access Panel Door For Wall / Ceiling Application (Push-Lock) With Solid Frame - [Outer Dimensions: 21" Width X 21" Height] w32h32 For Lay-In T-Bar Ceiling - 4 X 12 Is CRFG2028 Width_14in

For Lay-In T-Bar Ceiling - High Quality Steel Construction

+ Product Details Size - 6"w X 24"h X 2"d (for duct opening measurement only)

Achieve the perfect airflow with adjustable control by rotating the middle disk

with an additional 1 7/8" width and 2" height

+ Product Details Size – 16" x 26" or 26" x 16" is the size for the duct opening measurement only

20" X 20"Universal Aluminum Access Panel Door For Wall Ceiling Application (Push Lock) With Solid Frame [Outer Dimensions: 21" Width X 21" Height] w32h32 For Lay In T Bar Ceiling 4 X 12 Is CRFG2028 Width_14in For Lay In T Bar Ceiling High Quality Steel Construction + Product Details Size 6"w X 24"h X 2"d (for duct opening measurement only)