-Alumina crucibles feature highly resistant to chemical erosion.-Recommended for chemists, metallurgists and others involved in high temperature work demanding contamination free results.-For use in reducing and oxidizing atmospheres and refractory metals (such as molybdenum, platinum, rhodium, tungsten, tantalum, and iridium). Specification:Material: Composite Ceramic (30% MgO2 + 65% SIO2 + 5% AL2O3)Max. Working Temperature: 1300CMax. Capacity: 4.5mlSize (L*W*H): 63 x 13 x 13mm (2.48" x 0.51" x 0.51")Thickness: 2.5mm (0.10")Fit Furnace Tube I.D.: >=18.
eBay