27 concrete slab elements, each with a base area of 60 x 30 mm (total length over 80 cm). 40 smaller, partly trapezoidal elements for branches, curves etc. and as filler pieces for tracks at level crossings. Processing is very simple: Glue »concrete« panels to the system panel. Possibly. "work out" the lanes a little with a little dry paint. Put tufts of grass and dandelions in the cracks - a really beautiful old concrete slab street is finished.