This pictures show the model greatly enlarged - consider
that the tank is less than 21mm (0.8") long and the roadwheels are 2.9mm in
diameter (0.11").
The tanks are cast in a grey plastic which has ideal properties; it
is light yet strong and accurately reproduces the full detail of the master prototype. Being light (each tank weighs about 3 grammes)
allows the tanks to be put on Z scale wagons and pulled by locomotives.