Material: 316L Stainless SteelStyle: Gothic, Biker, StatementWidth: 21mm Our Stainless Steel Rings are made from the highest quality of Grade 316L Stainless Steel. Grade 316L, the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures. Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures. We have the BEST PRICE in the market Guarantee! Our products are beautiful, high quality, and affordable. It also comes with 30-Day Money Back Guarantee to ensure your satisfaction!