this is the one to start with

Model Number: 20001199

Model Number: 360-103

Radius Curve

Model Number: SL-E895

Atlas 11284 HO Scale Trainman Union Pacific PS-2 Covered Hooper #11437 ProductID_11381016 this is the one toThis is an Atlas 11284 HO Scale Trainman Union Pacific PS 2 Covered Hooper #11437. Covered hoppers are a relatively new car family. The AAR considered these special cars until the 1980s when they finally got their own car type code category. These early covered hopper designs were built primarily for more efficient cement loading and unloading (previously cement was bagged and placed in box cars). This two bay covered hopper car design was built by