No, these cars aren't made of chocolate, but they are good enough to eat! In yet another first for PWRS, we are pleased to bring you the new Intermountain Railway ACF 2 bay covered hopper. The American Car and Foundry 2970 cu ft hopper was 36' 11'' long and were built for carrying dense, granular materials such as cement. Our first offering in this exciting new line is the ''chocolate'' 2 bay for Burlington Northern Santa Fe. These cars can be seen across the BNSF system, carrying cement and other materials to build the modern world.