This is a single-ear body piercing made with EVER METAL, which is permanently rust-resistant. Made of skin-friendly stainless steel, it can be worn with peace of mind by those with metal allergies. The surgical stainless steel material is also used in medical scalpels, making it resistant to rust and discoloration, and excellent in corrosion resistance and anti-metal allergy properties. The material uses surgical stainless steel, which is also used in medical tools such as scalpels and scissors, so it can be used with relative peace of mind even by those with metal allergies (this does not guarantee that all people will not develop metal allergies). In addition, it is resistant to discoloration and rust, and has high hardness, making it difficult to scratch, so you can use it for a long time. Material: EVER METAL [Surgical Stainless Steel 316L] EVER METAL, a patented material, is treated to prevent metal allergies and is permanently rust-resistant, but it is a very difficult metal to process. We have succeeded in three-dimensionally molding this EVER METAL into earrings and body piercings using advanced technology. Material: Stainless steel