This detailed, ready-to-run Atlas Master HO Scale ACF 50' Precision Design Rib-Side Boxcar is based on cars built by American Car & Foundry in the late 1960s and early 1970s. The cars were produced in both smooth side and rib side versions and the models reflect these differences as appropriate for each roadname. This model features a detailed injection-molded body with applied separate details, appropriate 70-ton roller-bearing trucks, die cast underframe, free-rolling metal wheelsets and AccuMate(R) magnetic knuckle couplers.