Simply Power Socket Extension 5m Long 12V cigarette lighter cable 10amp (Packaging may vary)

Amazon

5M EXTENSION CABLE - Ideal for in car use. EASY TO USE - just plug in and it's ready to use. MULTI USE - ideal to extend power into the back of a vehicle or allow a socket to be used away from the vehicle.

Zoro Tools

Size: Cable Wire Length: 5M/196.85inch. The Plug Size: 9x2.5cm (L*W) /3.54x0.99inch. The Socket Size: 8x2.5cm (L*D) /3.15x0.99inch. Output voltage:12V 10Amp/120W