MTH Railking modern O gauge freight cars in OBs. Eleven cars include 7730 Pennsylvania caboose, 7418 Pennsylvania boxcar, 7517 New York Central hopper, 7721 New York Central caboose, 7212 Pennsylvania gondola, 8501 New York Central die cast caboose, 8616 MerchantÕs Biscuit die cast reefer, 8603 Pacific Fruit Express die cast reefer, 8608 New York Central die cast reefer, 8619 Century Beer die cast reefer, and 8601 Erie Lackawanna die cast reefer. Cars are generally C8. OBs have some light wear.