Finish is epoxy powder coat for enhanced corrosion resistanceLarge back box for ample wiring roomGround screw installed in bodies for ground continuityCorrosion resistant stainless steel hex head captive screws hold covers to bodyFactory sealed enclosure eliminates need for adding sealing fittings and compound at each conduit entranceStainless steel pushbutton shaft operates within stainless steel bushing assuring long, maintenance free operationSmooth, rounded integral bushing in each hub protects conductor insulationPushbutton and selector switch contacts are silver cadmium oxide which are "sealed" in lower phenolic chamber isolated from corrosive elementsEnclosed stainless steel helper spring prevents accidental operation of pushbutton in severe vibration installations