Atlas 20006404 Master Plus HO ACF 5250 4-Bay Covered Hopper, Citco #5297Atlas 20006404 Master Plus HO ACF 5250 4 Bay Covered Hopper, Citco #5297 Part Number: 843069186502 Description Atlas 20006404 Master Plus HO ACF 5250 4 Bay Covered Hopper, Citco #5297 Atlas Item #: 20006404 ACF introduced the 5250 cubic foot size covered hopper in 1964, and has since built nearly 20,000 cars. Most of the cars were equipped with pneumatic outlets and eight 20" round hatches for use in transporting plastic pellets. In addition to the