-Alumina crucibles (or corundum crucible, aluminum oxide >99%) feature highly resistant to chemical erosion.
-Recommended for chemists, metallurgists and others involved in high temperature work demanding free results.
-For use in reducing and oxidizing atmospheres and refractory metals (such as molybdenum, platinum, rhodium, tungsten, tantalum, and iridium).
-Heating or too fast or uneven heating may crack the crucibles. Slow down the heating / rate is good for extending its lifespan.

Specification:
Material: Corundum (Al2O3)
Max. Working Temperature: 1600C
Capacity: 10ml
Max. Capacity: 11ml
Top Outer Diameter: 29.5mm (1.16")
Top Inner Diameter: 25mm (0.98")
Bottom Diameter: 20mm (0.79")
Height: 27mm (1.06")