Marklin 72021 Current-Conducting Couplers
Operating close coupler set with single-pole electrical connection for lighted passenger cars. This coupler can be used for cars with the lengths 26.4 cm / 10-3/8, 27 cm / 10-5/8, and 28.2 cm / 11-1/8 that are ready for lighting kits. These couplers can be used when you are installing the 73400/73401 lighting kit. One car in the consist requires a 73404, 73406, or 73406 pickup shoe.
Contents:

• 2 close couplers for standard coupler pockets with contacts (enough for 1 car)
• 2 sets of contacts for the coupler shafts,
• 1 ground spring for the truck,
• 2 wires for connections, and instructions are included.

You have reliable connections with snap-in contacts. You can couple and uncouple a car with this coupler manually on a layout; these couplers will also couple with regular close couplers without electrical contacts.