Tunnel plugs made with black pvd on 316L stainless steel that have a hexagon shape. These plugs provide a secure fit with a screw-on back for easy installation. The full length measures 10mm with a wearable area of 7mm, and sizes range from 8G (6mm) to 1" (25mm). For healed piercings. Externally threaded. Sold in pairs (2pcs).