This band has a comfortable 1/2-round cross section. If you look closely at this ring you will see a subtle line running around the perimeter, marking the parting line of the mold.
The shibuichi variant features a silver lining, to prevent the metal from staining your finger. The brass version is un-lined, and for most folks it will leave a stain on the finger its worn on. If desired this can be prevented, by painting the inside of the band with nail polish.
First model is wearing SILVER
Second model is wearing SHIBUICHI