This easy-to-assemble Accurail 50-Ton Offset-Side 2-Bay (Twin) Hopper kit is based on widely used coal and aggregate hoppers constructed to AAR Designs. This model kit features a one-piece detailed injection-molded plastic body with most details molded in place for durability during operation. Other features include realistic decoration with end reporting marks (on decorated models), underbody details, trucks with Delrin wheelsets, nonmagnetic axles and AccuMate(R) magnetic knuckle couplers. This steel hopper kit is great for modelers of all skill levels and includes complete instructions. For added realism add Accurail Magnetic Coal Load #112-304, sold separately.