Finish is epoxy powder coat for enhanced corrosion resistance|Large back box for ample wiring room|Ground screw installed in bodies for ground continuity|Corrosion resistant stainless steel hexagonal head captive screws hold covers to body|Factory sealed enclosure eliminates need for adding sealing fittings and compound at each conduit entrance|Dozens of possible combinations of push buttons|Accurately tapped, tapered hubs for tight, rigid joints and ground continuity|Stainless steel pushbutton shaft operates within stainless steel bushing assuring long, maintece free operation|Smooth, rounded integral bushing in each hub protects conductor insulation|Enclosed stainless steel helper spring prevents accidental operation of pushbutton in severe vibration installations|Clearly marked terminals with brass screws and spade terminals assure quick, easy wiring