20A 2 Terminal Quick Connector (Wago 221)
Length - 18mm
Height - 13mm
Width - 8mm
This simple connector has a quick fit action, removing the need for a screwdriver. The lever at the top is pressed back the other way to tightly grip the cable conductor securely.
Before starting any electrical work, always switch off at the mains. If in doubt consult a competent electrician