Opal Glitter Set Flower Petals CZ Center 316L Surgical Steel Hoop Ring for Nose & Ear Cartilage *Perfectly Annealed for Bending and Twisting. Bar Thickness: 20GA (0.8 mm) Bar Length: 5/16" (8 mm) Material: 316L Surgical Steel Stone Material: Synthetic Opal, CZ Sold by: 1 Piece