For a connection between short-coupled rolling stock with unipolar power transmission. Suitable for insertion into the unified coupling for short coupling of all modern Märklin-H0 carriages 26.4 cm and 27 cm long with slot guides. For each composition of illuminated carriages, a single lighting shoe may therefore be sufficient. In addition to two current-conducting short coupling heads, the standard scope of delivery also includes the power transmission components for the subsequent equipment of the kinematics as well as the cable connection terminals for the interior lighting for one carriage. Hooking and unhooking on the system is only possible manually. Pack of 2 short coupling heads and power transmission components for equipping a carriage. Assembly instructions included. The detachable current-conducting short hook 72020 is suitable as an alternative or conversion option for the rigid current-conducting coupling rudders from the 7319 extension kit