Description: With high purity alumina, the crucible has a high quality and strong durability. Professionally designed for research and chemical experiments. High purity: Al2O3 >99 percent chemical resistance Good temperature resistance, Can be used at 1600°C for a long period, and at 1800°C for a short period. Great resistance to sudden cooling and heat Specification: Material: alumina Size Chart: 1: 50ml Inner caliber diameter: approx. 43mm or 1.69'' Outer caliber diameter: approx. 50mm or 1.97'' Height: approx. 52mm or 2.05'' 2: 100ml Inner caliber diameter: approx. 53mm or 2.09'' Outer caliber diameter: approx. 60mm or 2.36'' Height: approx. 67mm or 2.64'' Package Includes: 2 Pieces Alumina Crucible Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.