Ceco hollow steel half glass door, mortise prep, steelcraft hinge w/glass, 16 ga, 36"w x 84"h hollow metal steel door with honeycomb core, 3 hour fire rating, 16 gauge, mortise lock prep, thermal insulation u factor 0.41, non handed, includes closer reinforcement, hinge locations from top of door, 7-3/8", 39-5/16", 71-1/4", lock prep location from top of door, 39-1/2", window size 29" x 23", visible glass 28" x 22", includes glass 1/4" clear wire glass with safety film.