Frame shall be 16 gauge cold rolled steel with 1 inch flange. Door shall be fabricated from 20 gauge cold rolled steel, insulated sandwich type construction. Door shall be self-latching with automatic closer and interior latch release mechanism. Hinge shallbe flush continuous piano type. Latch(es) shall be a knurled knob/key operated latch bolt (optional: preparation to receive 1.125 inch mortise cylinder cylinder provided by Larsens or others). Finish shall be baked on powder coat (optional: galvanized bonderized steel or stainless steel with #4 satin polish finish).