Detailed Description: Schneider Electric / Square D Harmony™ Ronis 520E Round selector switch head in black color, features spring return right to centre as well as left key withdrawal position operation. It is suitable for use with for key selector switch. It measures 29 mm x 29 mm x 72 mm. The 3-Position selector switch head has plastic bezel. It comes with mounting hole of diameter 22 mm. Selector switch head features IP69K and IK06 protection. It withstands a temperature range of -25 to 70 degree Celsius. The selector switch head is IEC approved, UL listed and CSA certified.