This is a Micro Engineering 10-136 On30 Scale Code 100 36 Non-Weathered Flex-Track (Pack of 6).
Non-weathered track has a natural gray tie color and nickel-silver rail in 3' lengths.
It features 6 pieces of 3' each, 18' total length, flex-trak features scale size ties, tie plates and spikes, and irregular tie spacing.