| Owner: | General American Marks Company |
| Type: | Open Hopper |
| AAR Class: | HMS: Specialty Open top self-clearing car, having fixed sides and ends and bottom consisting of two divided hoppers with doors hinged crosswise of car and dumping between rails. |
| AAR Type: | K324 |
| Detail Info: | Hopper, Load Limit: 185,000 and greater, Less than 3000 cu ft capacity *Light Density Service |
| Plate: | B |
| Dry Capacity: | 2400 |
| User Notes: | ex-MWAX 4399 |
