Micro-Trains Line -- RD# 81676 -- Union Pacific Covered Hopper -- These 3-bay high-side covered hoppers are grey with black lettering and run on Barber Roller Bearing trucks. Built by Pullman Standard and rebuilt in the early 1990s, this car featured self-cleaning and gravity unloading. Belonging to series 80950-81950, these cars were 4,427 cubic feet in capacity.