Simply as many rings on the ´vcock- as good for a comfortable depth of penetration, everything goes more smoothly and shocks are also cushioned.
With the rings you can determine the depth of penetration yourself. In the set are 4 soft, stackable rings, a travel case and inspirations.
The width stretches to 20,3 cm (8 in) and the unstretched height of 4 rings is 7 cm (2¾ in).