✦ Sold as Single ✦ Bend pin slightly before inserting for a secure fit (see photo for instruction) [SPECS] Material: Implant-Grade Titanium (ASTM F-136) Stone: Synthetic Opal (Blue), Prong Setting Opal Size: 2mm, 3mm, 4mm Bar Lengths: 6mm, 8mm Bar Thickness: 16G (1.2mm), 18G (1.0mm), 20G (0.8mm) Labret Flatback Width: 2.5mm Threadless Push-In System Gauge Guide: 16G — helix, tragus, conch, daith, cartilage 18G — earlobe, cartilage, nostril 20G — earlobe, nostril Deep blue opal raised in a prong setting that catches light from every angle. The prongs lift the stone so you get the full range of blue, teal, and green color shifts that make blue opal one of the most popular piercing stones. Complete stud with threadless labret bar included. Why you'll love it: Implant-grade titanium — biocompatible and safe for healing piercings Prong setting showcases the opal's full color play Flat back sits flush for all-day and overnight comfort Push-in threadless system — easy jewelry changes More opal colors: White | Purple Prefer a bezel setting? See our blue opal bezel stud — smooth and snag-free. Just need the top? See our opal prong threadless top.