Features: Material: Silicone , Silicone tunnels are completely metal free and hypoallergenic making them perfect for people with any degree of nickel sensitivity. These are soft and flexible making them easy to put in and comfortable to wear all day and night. The size selected will be the measurement at the wearable area. All items are shipped based on the mm size selected. Wearable Area (length): about 8mm Gauge: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm Quatatity: 1 Pair Packet Include : 1 Pair Thin Flexible Silicone Ear Skin Tunnels Plugs Ear Gauges Earskin Earlets