Expand HO freight service with these colorful WalthersMainline models based on the popular American Association of Railroads (AAR) standard boxcar design from 1944. Used for all types of general loading, the durable steel cars were still going strong into the 1980s. Features of these models include: One time run of these roadnumbers, order now - limited quantity available 4-4 Improved Dreadnaught ends Murphy panel roof See-through Apex steel running board 6′ Youngstown doors 10′ 6′ Interior height AAR (Tab) side sills Correct 33′ RP-25 turned-metal wheelsets Proto MAX(TM) metal knuckle couplers