Hubbell - SWB-4Killark SWB SERIES CONTROL STATION BACK BOXES provide control solutions in hazardous location areas to supply; START STOP Motor Functions, LED Pilot Light Indications and more for use with Killark XCS and XS Cover Assemblies. For use in Class 1 Division 1 & 2, Class 1 Zone 1 & 2 areas for indoor use and are Non Factory Sealed requiring the need for a conduit seal fitting. UL Listed and CSA Certified. The SWB is offered in a wide variety of