This stylish spiral barbell is a classic! Recommended for not only earlobes, but also cartilage and lips ◎ ● Metal allergy対応 (Metal allergy compatible) Spiral barbells use surgical stainless steel 316L, a material that is unlikely to cause allergic reactions. It is a reliable and safe quality product, having obtained the only certificate in Japan! ● Detailed inner diameter size selection! We have a selection from approximately 6mm to approximately 18mm, so even if you want the perfect inner diameter size... you can choose the size in detail ♪ Furthermore, it has double-sided screw-type catches, so you can arrange it freely! Let's stand out from the crowd with special earrings that arrange the unique spiral! I'm not wearing it because I bought it with the wrong size.