As One Magnetic Evaporative Dish (Round Plate) 6-558-01 Model Number: D-30 Chemical Composition: SiO2/34.85%, Al2O3/59.40%, Fe2O3/0.39%, TiO2/0.13%, CaO/0.1%, MgO/4.18 %, Na2O. /0.84 % ● Heat Resistant Temperature: 222°F (1,100°C), Outer Diameter: 2.4 inches (60 mm), Size: 1.1 fl oz (30 ml)