Glass Beads, 5-6D MM, Solid Glass, 250 Grams/Pack

For use as distillation column packing, mixing beads, and boiling stones. Physical and Chemical Properties of GG17 High - Temperature Resistant Glass GG17. Silicon Content: 80%, Softening Temperature: 820°C, Annealing Temperature: 560°C, Strain Temperature: 520°C, Coefficient of Linear Thermal Expansion (20 - 300°C): 32×10?7/°C, Specific Gravity: 2.23 g/cm³, Refractive Index: 1.47, Specific Heat: 0.211 cal/(g·°C), Thermal Conductivity: 0.0028 cal/(cm·s·°C), Light Transmittance: 92%.