| Specifications | HR 304 | HR 404 |
| Working width (m) | 3 | 4 |
| PTO speed (rpm) | 1000/750/540 | 1000/750/540 |
| Gearbox | Duplex or Multiplex | Duplex or Multiplex |
| Minimum power requirement for PTO (kW) | 59 | 73 |
| Minimum power requirement for PTO (hp) | 80 | 100 |
| Maximum authorised tractor power (kW) | 140 | 140 |
| Maximum authorised tractor power (hp) | 190 | 190 |
| Weight with Maxicrumbler roller (kg) | 1100 (Duplex) 1140 (Multiplex) | 1470 (Duplex) 1510 (Multiplex) |
| Weight with Packer PK2 roller (kg) | 1295 (Duplex) 1335 (Multiplex) | 1740 (Duplex) 1780 (Multiplex) |
| Weight with Maxipacker roller (kg) | 1325 (Duplex) 1365 (Multiplex) | 1790 (Duplex) 1830 (Multiplex) |
| Transmission | With cam type cut-out clutch | With cam type cut-out clutch |