Implant grade ASTM F-136 titanium internally threaded Opals.Opals are 3 Pronged.14G is 1.2mm internal thread14G Titanium Internally Threaded 3 Prong Round Opal C$27.50PriceGem Size*SelectGem Colour*SelectQuantity*Add to CartNo Reviews YetShare your thoughts. Be the first to leave a review.Leave a Review