| Model | Dimension (L x W) | Fit Motors | Reduction Ratio | Max. Allowable Torque |
|---|---|---|---|---|
| 2GN | 60mm x 60mm | 6W | 3~180 | 25kg-cm |
| 3GN | 70mm x 70mm | 15W | 3~180 | 50kg-cm |
| 4GN | 80mm x 80mm | 25W | 3~1,800 | 80kg-cm |
| 5GN | 90mm x 90mm | 40/60W | 3~1,800 | 100/150kg-cm |
| 5GX | 90mm x 90mm | 90/120W | 3~1,800 | 200/250kg-cm |