1.2 mm, 1.6 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 19 mm or 20 mm Flesh Tunnel Supernova High Polished made of 316L surgical steel from the High Polished Collection by Supernova CONCEPT. The tunnels are particularly comfortable to wear thanks to their polished surface and brilliant shine.