- Made of light alloy.
- Adjustable dorsiflexion and plantarflexion assist strengths each joint.
- Straight lateral joint: A
- Curved medial joint: B
Technical features
| Including | Upright Section | Recommended upright | Compatible stirrup | Item N°. | 
| A x 2 | 16 x 4 mm 0.63 x 0.16’’ or 18 x 5 mm 0.71 x 0.2’’ | 2M135 | 2C53 | 2C137 | 
| A + B | 2C138 | |||
| A x 2 | 22 x 6 mm 0.87 x 0.24’’ | 2M155 | 2C151 | |
| A + B | 2C152 | 
 
            