A spiral cuff is shown in open and closed configurations in the schematic on the left.

On the right, a cuff with a single contact is shown opened out (top) and in its spiral form (bottom).

The spiral configuration is achieved by laminating two sheets of silicone rubber together, with one of the layers stretched in relationship to the other. The stretched layer forms the internal aspect of the cuff. Increasing the relative stretch produces a cuff with a smaller internal diameter. Stimulating contacts are embedded between the outer, unstretched, layer and the inner, stretched, layer prior to lamination.

On the left of this figure, a self-sizing spiral cuff is shown being placed around a nerve trunk. The arrow points to one flap of the cuff
On the right, the cuff electrode is in place. Care should be taken in routing lead wire to avoid tugging on nerve and lead wire should be placed in a way to avoid nerve injury.