Adaptor from plug CEE 5-pole 16A to 1 socket CEE 4-pole 16A 400V IP67

IEC 60309 - Wikipedia

Industrial Plug, 5Pin CEE Socket Connector IP44 Waterproof Prevent Aging Industrial Connectors Red for Camping Caravans 16A 220‑380V(HR-015 male)

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CEE Intratec High Current Socket 16A 400V 6h IP67 (Splash-Proof) 5-Pin (3P+N+E): IEC-60309 Industrial and Multiphase Plug Robust Industrial Quality : : DIY & Tools

CEE plug 16A, 5-pole, black, 400V, 6h, IP67 - CEE, LTH

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Cee Plug 16A 5P 6H 400 V (50+60 Hz) Red 219

UNIVERSAL NEMA 6-15P PLUG ADAPTER, 10 AMPERE-250 VOLT, 2 POLE-3 WIRE GROUNDING (2P+E). IVORY.

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Waterproof Outdoor Socket, Cee 32a Socket Waterproof