This Schneider Electric Harmony XB4 neon bulb is supplied with 230Vac. It is compatible with Harmony XB4, XB5 and XB7 This neon bulb is designed to be a long lasting bright indicator for signaling with energy efficient solution. It is easily installed into a standard 22mm diameter controls and signaling units. Simple modular design facilitates post installation servicing, modification and adaption of machines by non-specialists. Designed to fit with a standard 22mm control and signaling units, ensuring compatibility when installing in pre-existing machinery. High brightness for easy identification and signaling of function and operation mode. It weighs 2g. It is compatible with Harmony XB4, XB5, XB7. It is sold in lots of 10.