This pack comes with two different sizes of truss frame and three different sizes of truss supports and girders designed to fit on different lengths of wagon. The pack is scaled to N gauge however can easily be scaled up to 00 gauge, TT:120 and 3mm.
 
For those modelling in TT:120 the model can be scaled by 125% and those modelling in 3mm can scale the model by 150% and those in 00 gauge can scale by 200%