Potomax AVA Bead - Antique Brass. Add a unique touch of style to your jewelry designs with the metal AVA bead. These beads are produced in Zamak metal to create a hardened, durable bead that will stand the test of time. Use the metal bead in place of standard glass AVA beads in any projects. The Potomax Metal AVA bead has 3 holes for easy stringing and design flexibility, they measure 10x4mm and come in a pack of 50.