| Owner: | Union Pacific Railroad Company |
| Type: | Box Car |
| AAR Class: | XP: Boxcar similar in design to "XM", but which is specially equipped, designed, and/or structurally suitable for a specific commodity loading; except, boxcars (XF, XM, XMI) dedicated to the transportation of commodities in paragraph A, Rule 97, AAR Interchange Rules, must be designated "XP". |
| AAR Type: | A403 |
| Detail Info: | Equipped Box Car, Inside Length: 49' to 59', cushion draft gear/underframe, Sliding door, opening greater than 11 feet |
| Plate: | B |
| UP Class: | A-100-16 |
| Max Gross Weight: | 263000 |
| Load Limit: | 193200 |
| Dry Capacity: | 5000 |
| Ext L/W/H: | 56' 7" / 10' 8" / 15' 0" |
| Int L/W/H: | 50' 7" / 9' 6" / 10' 6" |
| User Notes: | ex-UP 300310 |
