Tunnel made of surgical steel with black coloring. This particular jewel is threaded externally, the ring is screwed on the external thread of the tunnel and guarantees a perfect seal.
Piercing for expansion or for the maintenance of dilated holes (dilator), definitively affirmed on the piercing market thanks to Wildcat in 1990.
This piercing tunnel is internally empty and can also be used in other dilated parts of the body.
The tunnel is sterilizable!