This kit contains laser cut wood and cardboard parts that assemble into a nicely detailed model of an open roofed platform toilet block. During the early years of steam railways these facilities were open roofed. The interior detail provided with this kit includes, a wash basin with tap, the cistern and of course, the urinals.H0 gauge (1;87 or 3,5mm/ft) is a standard gauge in mainland Europe. OO gauge (1:76 or 4mm/ft) is a standard gauge in the United Kingdom. This product can be used for both gauges.