1. 9mm Septum Ring / 9mm Hoop Earring: 14 gauge (thickness: 1.6mm), inner diameter 9mm ( 23/64 inches ). Please check the inside diameter carefully according to the SIZE CHART OF THE HOOP NOSE RING. Select the most suitable size for yourself. 2. Made of 316L surgical steel, high polished. 316L steel is the most basic metal used in body jewelry. It is the basic requirement of metal to be used in initial piercings and for healing. There are better grades (below) but usually they cost more as well. For most people this grade of steel works just fine. Polished very well, comfortable to wear without sharp edge. 3. This price is for 2 pieces of same rings hoop. It can be used as nose rings hoop, septum jewelry - septum ring / septum clicker, lip rings, helix earrings, cartilage earring, rook earrings, ear lobe earrings hoop. 4. Saves time - easy to open and close the click closure by hand, Not require a tool.And it's still tight after long-term use, needn't to worry about lost when bathing, walking or exercising. FANSING Nose Hoop 2 Pieces Surgical Steel Nose Rings Cartilage Earring HoopHinged Septum Jewelry for Nostril Helix Tragus Daith Conch Lip Rook Ear Lobe Piercings 18k Rose Gold-plated 14 Gauge 9mm