Round Blank 40mm Disc for Enameling Soldering Stamping Texturing, Metalworking Supplies - 3 PiecesCopper, Brass, Bronze or Nickel Silver, Blank 40mm Disc Circle of Life for Metalworking Soldering Blank Jewelry Making Blanks, R 040, Type of Metal Copper, Brass, Bronze or Nickel Silver, Grade of Metal 1st Grade, Gauge of Metal Select Above Variety, Measurement 40mm, Quantity 3, All shapes can have holes drilled in them, just send a convo with your request. Materials: copper, 100 percent copper, blank, metal, pure copper, brass, bronze, nickel