Joybeauti Unisex Stainless Steel Illusion Round Tunnel Plug Post Stud Earrings Material: Stainless Steel, hypoallergenic Diameter: 4mm & 6mm & 8mm 10mm & 12mm; Pin Thickness: 0.8mm (20 Gauge) Color: Black Earrings Back: Friction Back Post Quantity: Pack of 5 Pairs