Specification - MI-SF - Surface Access Door Material - MI-SF Series is 16 gauge steel door and frame. The MI-SF-SS stainless steel Series is 16 gauge #304 stainless steel door and frame. Finish - Steel doors have a primed white finish. Stainless steel doors have a #4 brush satin finish. Door - Flush to frame. One 1/4" (6) hole in each corner. A 3/8" (9) wide outer perimeter space of the frame is bent on a fifteen degree angle toward the wall. Hinge - Continuous piano hinge. 175 degree opening. Latch - Standard - Flush mounted, screwdriver operated cam. Optional - Allen key, cylinder key, or vandal resistant latch. All of MIFAB's cylinder key locks are keyed alike. Packaging - One door per carton.