Elmdor 12"x24" DW Series Access Door For Drywall Applications, Galvanized Steel, Primed For Paint DW Access Panel DURABLE MATERIAL - 16 gage, galvannealed steel with a prime coat finish CEILING OR WALL MOUNT - Fits Rough Opening - 12-1/2" W x 24-1/2" H. EASY ACCESS - Screwdriver operated cam latch, continuous piano hinge, and rounded safety corners. EASY INSTALLATION - Frame is one piece construction with a 1 flange and includes 1/4" mounting holes. BONUS - Contains recycled material, recyclable.