In the late 1970's, Raibox was looking for a new box car design that would offer more versatility than other cars already in service. Railbox and FMC came up with the 50 ft combo door box car that had both a 10" Youngstown door and a 6" plug door. This design became the easily recognizable "ABOX" seen across the country. Railbox was far from the only operator of these cars, as other operators either bought new cars or purchased excess Railbox rolling stock. Today, examples of these cars can still be seen in a large variety of schemes.