Killark FXSD41 - Motor running protection when overload heaters are used.Factory Sealed so no external seals are required.Type 3 (raintight) rated.Enclosures are cast copper-free aluminum alloy.Operating shaft is stainless steel.Multiple gang assemblies available in combination with pilot lights, pushbuttons and switches on request.Ground flange joint between bolted cover and box provide required flame path.Provisions for padlocking switch in either “ON” or ”OFF” position is standard. Killark's FXSD/FXSX Series of Factory Sealed Hazardous Location Manual Motor Starting Switches provide manual starting and stopping of motor loads. Rated for indoor and outdoor applications, the copper-free aluminum construction is ideal for harsh and hazardous environments. Standard motor rated switch configurations include Square D Type F with Overload Protection (FXSD Series) and Square D Type K (FXSX Series). Note: Overload Heaters are required, but not included as standard, and need to be specified based on FLA (Full Load Amps) of motor.