Surgical Steel Halo Filigree Screw Flesh Tunnel. This 2 Piece Screw Tunnel, with one rim that screws on and off, would look great in your lobe. Also available are other Filigree styles. TDi Body Jewellery also stock Screw Tunnels in various materials and styles. The sizes vary between the different materials, with the smallest being 2mm and the largest being 30mm. Oxidised effect item should not be brought into contact with solvents such as alcohol.