Pure 925 Sterling Silver Patented ITProLux Technology Supreme Quality Solid Links Super Shiny Nickel-Free Sturdy Lobster Claw Closure Gift Packaging Included 925 Italy Stamped P.LUX Stamped 5mm - 0.80 grams per inch ITProLux: A unique elixir that guarantees a longer life to Sterling Silver, an anti-oxidant system that keeps products shiny and brilliant throughout the years without turning black. An innovative solution that is miles ahead compared to the most commonly used systems, the anti-tarnish, and the e-coating. A significant step forward in the worldwide production of jewelry. Jewelry Care: You may clean the product with a bit of water and a non-abrasive cloth. Never expose plated jewelry to chemicals. Do not use jewelry cleansers as they are chemical based and are not made for plated jewelry. For safe keeping, keep the jewelry stowed away in a cool, dry place. Contact & Support: For questions or inquiries about any of our products, or simply about an order you've placed, please feel free to contact us through Amazon's messaging system. We're here to help :)