Color...Silver Material...Other metal Shape...Ring/Hoop Size...Free I think the material is iron. I bought it about 20 years ago at a fashion goods store. It was about 500 yen each at the time. Back then, I often wore this kind of hard accessory to rock concerts, but after giving birth, my constitution changed, and I became allergic to everything except silver, platinum, and titanium, so I stopped wearing them. How about it, you hardcore rock fans? Also great for cosplay and interior decoration! All items will be disinfected with alcohol, wrapped in bubble wrap, and shipped in an envelope via post. ✤Instant purchase welcome! ❖Please also see my profile❖