... surface. 2.Exposed fastener: Stainless steel. Control Stations(Aluminium Alloy)FZC-L Series Weatherproof Control StationsCopper-free aluminium enclosure; powder coated ... Exposed fastener: Stainless steel .Suitable to be used in the control circuit of AC 50Hz, voltage 415V or less, current less ... be recommended by us, the components mainly include button, meter, indicator, and universal switch, etc.