Specifications Model Number: D-30 Outer Diameter (φmm) 60 Capacity (ml): 30 Special Long Chemistry: SiO2/34.85%, Al2O3/59.40%, Fe2O3/0.39%, TiO2/0.13%, CaO/0.1%, MgO/0.1% 4.18% Na2O: 0.84%; Heat Resistance: 222°F (1,100°C).