This is a beautiful item, used twice. Material: 316L Stainless Steel Size: Diameter approx. 2.2cm, Width 2.1cm Surgical stainless steel refers to medical-grade stainless steel. Among over 200 types of stainless steel, this material has extremely low allergenic properties, making it less likely to cause metal allergies and very gentle on the human body. It is used in medical tools such as scalpels and scissors. It is resistant to rust and discoloration even when exposed to seawater, and it is a very hard material, making it resistant to scratches.