Approximately 8mm TierraCast® gold plated twist spacer beads. 7.5x2.3mm, large hole. TierraCast uses "Britannia" casting alloy for cast pewter components. Many jewelry makers use this kind of bead to add space, color, and texture to their beaded designs. Use on large diameter cording, or to keep beads with extra-large holes in place on TierraCast bead bars.