The Schneider ZB4BG3K1323A is a 30mm thermoplastic operator head, part of the XB4 series. It is an illuminated push button with an orange square-shaped head and an IP66 degree of protection against dust and water, meaning it is suitable for use in wet or harsh environments. The operator head is black with an engraved white circle and a red push button that glows when illuminated. The Schneider ZB4BG3K1323A can be used with a range of operating mechanisms, including the ZB4BV10, ZB4BV20, ZB4BV30, or ZB4BV35 switch.