... 2. Density, 3.85g/cm3, 3. Flexural strength, 360Mpa, 4. Max. service temp, 1800C. Model: Kejia Alumina Crucible(Round ... and Square)Features:1. High purity, (Al2O3≥99.7%; Fe2O3≤0.1%; SiO2≤0.2%.)2. High ... long term application; 1800deg C for short term application, 4. Resistant to sudden cold and hot, un-explosive,5 ... etc.Shipping and Delivery: by air/sea, in 7-10 days after receiving the payment