4-string · Bolt-on
Aluminum-bodied Jazz-style bass. Bolt-together aluminum body, bolt-on maple neck, ebony board, two single-coils. Specimen has built aluminum instruments since 1992 (originating with commissions from the band Tar); this Jazz version was updated in 2010 for Joe Principe of Rise Against. Hand-built in Chicago; commission pricing. String count not stated — 4 inferred.
| Construction | Bolt-on |
| Strings | 4 |
| Body | Aluminum (bolt-together) |
| Neck | Bolt-on maple |
| Fingerboard | Ebony |
| Neck Pickup | Single-coil (J) |
| Bridge Pickup | Single-coil (J) |
| Controls | Two volume, one tone |
| Made In | USA (Chicago, IL) |
Artists documented playing the Specimen Products Aluminum Jazz Bass: Joe Principe.