The tt model track system is the little brother of the h0 model track a quality consistent reproduction in 1120 scale with the 2 mm nickel silver profile it allows combination with standard track that has been laid on many systems a simple transition piece is used to accomplish this sleeper bands can be moved except on crossovers or double cross over points and the rail bands are inserted rather than moulded this means that sets of points can be modified by expanding or contracting and