10" X 10" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 11" Width X 11" Height] Compatible With Duct 12in thanks to counter-sunk screw holes

thanks to counter-sunk screw holes and included screws

+ Product Details Size - 4"w X 20"h is the size for the duct opening measurement only

+How To Measure A Grille Overall Size:

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 26" OR 26" x 36" duct opening (measured at the opening)

10" X 10" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 11" Width X 11" Height] Compatible With Duct 12in thanks to counter-sunk screw holes+ Product Details Size 10" X 10" is the size for the drywall opening measurement only, actual front end outer dimensions are 11" Width X 11" 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