Junction Box ConnectorIP68 Outdoor Waterproof Junction Box Electrical Cable ConnectorUse it to repair and extend power wires. It is safe enough to repair and extend electrical wires. ✔ Junction Box connector : 2 way (3-pole) M20 plug connector, with two sizes of rubber ring, Cable Range : Ø4.5-10mm, the connectors include "live wire"&"neutral wire"&"earth wire".
eBay