Gauge: H0 This coupler set is for a close-coupled connection between cars with single-conductor current transmission. It can be used in the close coupler pocket for all modern 26.4 cm / 10-3/8" and 27 cm / 10-5/8" long Märklin H0 cars with a guide mechanism. This means that a single pickup shoe will be enough for a consist of lighted cars. Contents of this set: Two current-conducting close couplers Hardware for current transmission through the guide mechanism Terminal clips for the interior lighting wire for one car. Each package has 2 current-conducting close couplers and the hardware for the current transmission to convert a car. Installation instructions are included. The 72020 current-conducting coupler, which can be uncoupled, is an alternative or conversion option for the current-conducting rigid coupler drawbars in the 7319 conversion set.