Walthers Mainline 910-40550 HO 40' Single-Sheathed Composite ARA Boxcar with Murphy Ends Undecorated NIB RTRWalthers Mainline 910 40550 HO 40' Single Sheathed Composite ARA Boxcar with Murphy Ends Undecorated NIB RTR Bring realistic variety to your HO steam and diesel era freight service with these detailed replicas from WalthersMainline. Based on later rebuilds and upgrades of standard 40' boxcar designs, these cars were in general freight service from the 1920s to to the 1960s, with many rebuilt for work train service lasting into the 1980s. Nicely