[General]:7 Pairs Stainless Steel Hoop Rings from 8mm to 20mm. Made of the stainless steel that is free of nickel. In terms of allergic safety and high durability this material is superior to most precious metals. anti-tarnishing, scratch-resistant. High polished and Smooth surface to wear it. [Size]: Gauge:18g= 1mm; Pin legnth: 6mm ; Hoop inner diameter: 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm ; Tube diameter:2.5mm [Function]: For ear lobe, cartilage, tragus, helix, nose, lip, eyebrow, but all based on the thickness of your fresh and bones. You have to understand it¡¯s 18G 6mm pin. Don¡¯t buy if this is not your size. [Note]:1) Read the size information before purchase. The pin is only 6mm in length; 2) Sterilize it with Alcohol Prep Pad or medical alcohol before wearing. [After-sale Service]: Unsatsified for any reason ? studs Pop out ? Don\'t like the color ? Too small Too large ? Clasp too tight or not tight ? ¡ Any problem with our product once received within 1 month, contact our customer service, we offer replacement or refund without return. No tedious return process.