The material is the brass ring, and the post is stainless.You are embossed on one side.The width of the ring is approximately 2mm.It is recommended to arrange in a group of cans to connect and arrange metallurals. *This is an accessory, so you may change the color by incorporating the changes in the fashion.Also, in the process of processing, dark shades of color may occur without prior notice.Please be careful.(Depending on the part, there may be a different color variation of the part and color.)