List of parts needed to build a set of Ratphones
| Parts | Description |
|---|---|
| 3D-printed pieces (stls files provided) | Implantable skull base |
| Central piece | |
| Lateral bar (×2) | |
| Speaker box, front (×2) | |
| Speaker box, back (×2) | |
| Lateral bar to speaker box connector (×2) | |
| Magnets | B222 (K&J Magnets, Inc.) one-eighth × one-eighth × one-eighth inch thickness; grade N42, nickel-plated magnetized through thickness |
| B3301 (K&J Magnets, Inc.) three-sixteenth × three-sixteenth × one-thirty-second inch thickness; grade N42, nickel-plated magnetized thru thickness | |
| Speakers | Knowles active receiver (MOD 2403260 00031; “Petra”) |
| Connector | Connector header through hole 3 position 0.100 inch (2.54 mm) |