IP43 Festoon Lampholder ES / E27 Side Cable Entries, Not Shade Compatible. Single Use, non reusable.
Width - 40mm, Height - 48mm
If for outdoors, this festoon lampholder is for use in sheltered areas only. It will fit onto festoon cable. It is single usage, so once fitted, it cannot be undone without breaking the lampholder. This is because the lampholder pierces the cable and should not be removed once fitted.
If in doubt consult a qualified electrician.