Glass Boiling Stones, 4-6mm Dia, (Aprox 500 Beads/4 oz)
Solid glass beads, from 4 to 6mm diameter. Used in boiling to relieve hot spots, these inert glass beads will help prevent instantaneous vaporization known as "bumping" 125g / 4oz of beads will contain approx. 500 individual beads.