24" X 24" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 25" Width X 25" Height] Floor Grille + Product Details Size -

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

Universal Fit – Measures 6" wide x 3-1-13/16" high x 3-1/8" deep

+ Product Details Size - 22"w X 36"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 16" duct opening (measured at the opening)

24" X 24" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 25" Width X 25" Height] Floor Grille + Product Details Size -+ Product Details Size 24" X 24" is the size for the drywall opening measurement only, actual front end outer dimensions are 25" Width X 25" Height High Quality High grade steel construction. Flush Access Door Is a type of door or panel designed to provide access to concealed spaces, such as HVAC systems, electrical components, plumbing pipes, or other utility areas. Unlike traditional doors that have visible frames and hinges, a flush access door is