B&O "Original Gray 1968" General American 4180 Airslide Covered Hopper #619031. - These cars features finely detailed underframe pipe arrangements . Color is accurate for each car & lettering isthe exact font & placement as the pototype. These cars feature all-metal free-rolling wheels and Kadee scale Couplers. These cars were used for the transportation of flour, sugar, starch, fertilizer, feed, chemicals, plastics, carbon black, etc. General American produced over 5000 0f these cars between 1963 71980. - Tangent Item # 16010-03.