Screw back tunnels plugs with black pvd along the inside. Made from 316L stainless steel.Available sizes: 2G (6mm), 0G (8mm), 00G (10mm), 7/16" (11mm), 1/2" (12mm), 9/16" (14mm), 5/8" (16mm).Full Length: 11mm X Wearable area: 6mm.Sold in pairs (2pcs).