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] w28h28 + Product Details Size –

+ Product Details Size – 24"w X 24"h is the drop ceiling HVAC supply grille size - for T-Bar lay-in

+ Product Details Size - 26"w X 22"h X 2"d (for duct opening measurement only)

Each product is made of UV- and fire-resistant ABS Plastic (UL-94V-0 equivalent)

Measure the size of the vent opening

Design – Circular return valves - designed to be used in low and medium pressure ventilation air conditioning systems

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] w28h28 + 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