Märklin H0 72021 Live coupling for express train carriages

Separable close coupling with single-pole electrical connection for illuminated express train cars. Suitable for the prepared wagons with a length of 26.4 cm, 27 cm and 28.2 cm when installing the interior lighting 73400. A wagon in the train requires a grinder 73404, 73405 or 73406.Contents: 2 short coupling heads for standard coupling holders with contacts , 2 sets of contacts for the coupling drawbars, 1 ground spring to the bogie, 2 connection cables andinstallation instructions.Reliable connection with latching contacts. Coupling and disengaging on the system is possible manually, and can also be coupled with regular close couplings without electrical contact.