Available for immediate purchase ⭕️ I am selling this because the size didn't fit me. ☻ ● From the purchase site below ┈ ┈ ┈ ┈ ┈ ┈ ┈ ┈ ┈ ┈ 【Surgical Stainless Steel for Metal Allergies】 ① The highest-grade metal allergy-friendly material, also used in medical scalpels. ② Extremely resistant to discoloration and rust. ③ Water-resistant, so you can wear it in the bath, hot springs, sea, and pool without worry ◎ This material is very popular not only with those who have metal allergies but also with those who don't, as it's "safe to wear all the time! Gentle on the skin!" ● Japanese Size 【16-17】, Inner Diameter: 18.1mm Please comment if you have any questions! ♩