Elmdor 18 x 36 Drywall Access Panel DW Rough Opening Size: 18 &frac12;" wide x 36 &frac12;" high Material: 16 gauge galvanneal steel, Finish: Prime coat suitable for painting Lock / latch: 5 x Screwdriver Operated Cam Latches Hinge: Continuous piano hinge Flange: 1" flange