Potomax Tile Bead - Antique Silver. Add a new look and feel to your designs with premium metal beads. These Potomax Tiles are cast in Zamack metal then plated in antique silver to produce durable beads. Use them in place of many different Czech glass multi-hole beads in projects to give a modern edge to your jewelry design. Potomax Tile Metal Beads have 2 holes, measure 6mm and come in a pack of 50.