Screw back tunnels plugs with a black onyx stone on the front. The stone is polished. Made from 316L stainless steel. Externally threaded. Available sizes: 2G (6mm, 0G (8mm), 00G (10mm), 7/16" (11mm), 1/2" (12.5mm), 9/16" (14mm), 5/8" (16mm). Full Length: 12mm. Wearable area: 7mm. Sold in pairs (2pcs). For healed piercings.