This Atlas Master(R) HO Scale Pullman Heavyweight Pullman 6-3 Sleeper is based on cars found across the country in both pool service and dedicated assignments to many colorful name trains from the 30s through the early 60s, with several ending their careers in MOW service. The Atlas HO Scale models feature full interiors, scale operating diaphragms, ice or Pullman mechanical AC as appropriate, full underbody detail, window glazing, prototypical trucks and Accumate(R) knuckle couplers. These cars are designed for operation on 24" radius or larger curves.