✦ 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 (White), Prong Setting Top Size: 2mm, 3mm, 4mm Bar Lengths: 6mm, 8mm Bar Thickness: 16G (1.2mm), 18G (1.0mm), 20G (0.8mm) Labret Flatback Width: 4mm Threadless Push-In System Gauge Guide: 16G — helix, tragus, conch, flat, cartilage 18G — earlobe, cartilage, nostril 20G — earlobe, nostril White opal in a prong setting on a silver titanium flat back stud. The iridescent rainbow flash of opal makes every angle a new color — and the prong setting gives the stone room to catch all the light. Comes with a 4mm flat back for a comfortable, secure fit. Complete stud ready to wear. Why you'll love it: Implant-grade titanium — biocompatible and safe for healing piercings Prong setting maximizes the opal's rainbow shimmer 4mm flat back sits flush for all-day and overnight comfort Push-in threadless system — easy jewelry changes Also available in: Gold More opal colors: Blue | Purple | White (2.5mm flatback) Prefer a bezel setting? See our white opal bezel stud — smooth and snag-free. Just need the top? See our opal prong threadless top (silver/gold).