Used only a few times. There is some blackening due to aging, but I think using metal polish would be good. The ring has a bumpy pattern called "Tsuchime" (hammered) made using a hammer. The front is hammered to tighten the metal, so it has a slender construction but also has strength. 【Material/Finish】 □ Brass, matte finish 【Specifications】 □ Wire diameter → Approximately 1.6mm □ Width → Approximately 18mm