14 gauge steel or 14 gauge Type 304 stainless steel. Seams are continuously welded and ground smooth. External mounting feet. Door and body stiffeners in larger enclosures for rigidity. Formed lip around all sides of enclosure opening excludes liquids and contaminants. Stainless steel exterior hardware. Stainless steel door clamps on three sides of door provide a watertight seal. Door removable by pulling continuous hinge pin.