Elektra Green Indicator Light 115V (They are printed to the maximum voltage rating of 110V and temperature up to 120C.)
Shaft diameter is 10mm, head diameter is 13mm, and the total length is 54mm.
This style and diameter of light it is used in many models of Elektra espresso machines, both domestic and commercial, based on the voltage of your country. We also carry them in 220V.