Back in the 1970s as demand for clean-burning coal rapidly increased, Pullman-Standard introduced a coal gondola for unit train service. Widely used by BN and many private utilities, unit trains of these cars hauled coal from Wyoming to users throughout the country. Thousands were constructed in the mid to late 1970s and many are still used in maintenance-of-way service and by secondary owners for moving scrap metal and other materials. Pullman-Standard Coal Gondolas feature detailed injection-molded bodies, static couplers, accurate decoration and metal wheelsets. Cars are available in six packs except for specially decorated cars such as double rotary cars.