Price Per Pair (2 Tunnels). 316L Implant Grade Surgical Stainless Steel Top Hat Earlets with Black O-Ring. Hand Polished with a brilliant shine. Overall Width is approx 11mm with a wearable area of approx 5/16inch (8mm) . These have a nice rim so they don’t fall out like standard Single flared Earlets. 10 (2.5mm) gauge to 5/8inch (16mm). Metric equivalents on order menu. Autoclave sterilized in a sealed pouch for your safety.