-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: 25ml
Max. Capacity: 26ml
Top Outer Diameter: 40.5mm (1.59")
Top Inner Diameter: 36mm (1.42")
Bottom Diameter: 22mm (0.87")
Height: 40mm (1.57")