Expand HO freight traffic from the 1920s to 1950s with the WalthersMainline 40′ American Railroad Association (ARA) 40′ Boxcars! As steel parts became readily available, car builders and railroads began using them in place of solid wood construction, resulting in a more durable car. Features of these models include: One time run of these roadnumbers, order now - limited quantity available! Typical of outside braced cars in service from 1920s to 1950s Perfect behind steam or early diesel power Detailed ′wood′ sides with ′steel′ bracing Murphy ends Flat steel roof Correct 33′ turned metal RP-25 wheelsets Proto MAX(TM) magnetic metal knuckle couplers