Athearn HO RTR PS 4740 Covered Hopper, CATX #5020** Defender only for learning its essentials SEA 327B only for learning its essentials and principles of working Transform Your Creations with Precision and Excellence MODEL FEATURES: Fully assembled and ready for your layoutBody mounted McHenry® operating scale knuckle couplers36” solid nickel silver wheels with RP25 contours operate on all popular brands of trackMulti packs feature unique road numbersWeighted for optimum performanceRazor sharp painting and printingMulti packs feature unique road numbersMinimum radius: 18”PROTOTYPE AND BACKGROUND INFO:Pullman Standard dominated the covered hopper car market beginning in the 1950s In 1967 the 4740 cubic foot capacity covered hoppers were the successor to the earlier 4427 cubic foot design