Jewelry can be used for Labret Stud, Lip, Tragus, Lobe, Earrings, Helix, Cartilage Jewelry, and Nose Ring Piercing. Product Materials: 316L Surgical Steel + High Quality Opal Gauge: 16G (1.2mm); Wearable Bar Length: 8mm Opal Diameter:2mm Package Includes: 4pcs Opal Stainless Steel Lip Rings(one blue opal,one pink opal,one white opal,one purple opal), come with one gift velvet bag. Description: Material is constructed of high quality Surgical grade Stainless Steel. Simply insert the opening of the hoop through the nostril. Twist and turn through piercing until the flat disc on the end is resting against the inner part of the nostril. 316L Surgical Grade Stainless Steel.Due to the camera and the computer screen showing,the color will be a little different.Please kindly understand.