Features and specifications All rings are beautifully sculpted and are well designed material 316 steel, also known as marine grade stainless steel, is a chromium, nickel, molybdenum steel alloy that has relatively good strength and corrosion resistance. 316L is the low carbon version of 316 stainless steel. 316L surgical steel is a common choice for biomedical implants, as well as for piercings and body modification implants. Hand polished and shiny Measure Not adjustable From 7 to 13, for details, see the size chart