| Specifications | GA 6501 | GA 7501 | GA 8121 | GA 8521 |
| Number of rotors | 2 | 2 | 2 | 2 |
| Working width (m) | From 5.40 to 6.40 | de 6.85 à 7.45 | 7.40 to 8.00 | 7.50 - 8.50 |
| Swath delivery | Central | Central | Central | Central |
| Number of tine arms per rotor | 10 | 11 | 12 | 13 |
| Number of tines per arm | 3 | 4 | 4 | 4 |
| Drive | Mechanical | Mechanical | Mechanical | Hydraulic |
| Tyre type | 195/65 R15 | 10.0/75-15.3 | 10.0/75-15.3 | 11.5/80-15.3 |
| Transport width (m) | 2.5 | 2.55 | 2.82 | 3 |
| Linkage | 2 point on lower link attachment | 2 point on lower link attachment | 2 point lower link attachment | 2 point lower link attachment |
| Minimum power requirement for PTO (kW) | 37 | 30 | 44 | 51 |
| Minimum power requirement for PTO (hp) | 50 | 40 | 60 | 70 |
| Tractor hydraulic equipment | 1 DA | 1 SA | 1 SA | 1 DA + 1 SA |
| Weight (kg) | 1260 | 1550 | 1925 | - |
| Rotor tyre type | 3 Super balloon wheels 16 x 6.50 - 8 | Super balloons 16 x 6.50 - 8 | Super balloons 16 x 6.50 - 8 | Super balloons 16 x 6.50 - 8 |