They're from Peru. They're ceramic. They're handpainted. Colors vary. Drilled gill to gill. Approximately 1 inch long. PCB's - Peruvian Ceramic Beads. Some of the PCB holes will take a 2mm cord, some just close to a 2mm cord. PCB = Peruvian Ceramic Beads. Sold in units of 5 so to buy 10 choose 2 units, to buy 100 choose 20 units