Brick Metal Bead - Antique Brass. Each bead is cast with Zamak (zinc alloy) then plated with antique brass to form a durable premium metal bead. These brick beads can be used in place of many different Czech glass multi-hole beads to create a new and stylish look in your designs. The Potomax Brick Bead measures 3x6mm, has 2 holes and comes in a pack of approximately 50.