This is a Micro Engineering 12-140 On30 Scale Code 70 36 Weathered Flex-Track (Pack of 6). 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. Manufacturer: Micro Engineering. Model Number: 12-140. Scale/Era: On30 Scale. Model Type: Accessories.