Offered as a standard feature on the company's Heavy Duty line of cabinets, sag-proof doors and hinges allow mounting equipment direct on the doors and prevent shipment damage. Frames employ double-ledge construction with the doors mounted flush with the frame and recessed within a protective perimeter of the frame. The doors are mounted with separable, extruded aluminum hinges having a 0.25" stainless-steel pin and nylon bearing. Available with ).25" thick, see-through bronze tinted acrylic windows with a 1.875" border, the doors are interchangeable. Options include different-sized viewing areas and viewing materials that provide EMI/RFI shielding. EQUIPTO ELECTRONICS CORP., Aurora, IL. (800) 204-7225.