Prototype: 1 flat car for containers and 1 tank car.
Model: Both cars come lettered and painted with vacation themes. Lengthens the train by 97 mm / 3-13/16". Contents: Track to expand the oval of track to include a passing siding. 7 sections of curved track, 5 sections of straight track, 2 turnouts, and 1 feeder track with wire. 230 volt / 8 VA plug-in transformer and suitable controller with continuously smooth speed control. Instructions for setting up everything and a track plan brochure are included. The packaging is arranged to hold the 81521 Fun Starter Set with the 81951 extension. The set can be expanded with the SET sets 8192, 8193, and 8194 and with the entire Z track program.