This is a standard type.

As for the electrical cartridges that are used to connect ordinary incandescent lamps, they are also available in several configurations. Most often, electrical cartridges are used in everyday life, the base of which has an E27 marking. This is a standard type. Its smaller copy, the so -called minion, is the base indicated by the cipher E14. Most often, the E14 base is used in nightlights, desktop lamps and in chamber lamps.