LGB 19904 Starter Track/Power Set
this set, you can make a fully functioning layout with a circle of
track so that you can have the same operation with a small locomotive as
with a starter set. The box contains: 12 each 11000 curved track, track
clips, a 110 volt power source, a locomotive controller, and feeder
wires. External diameter of the circle of track 1,290 mm / 50-3/4".