Kingda 20L alumina roller mill jar is precision-formed from 99% Al2O3 high-purity ceramic for high-volume grinding in industrial jar mills, offering superior wear resistance and product purity. Key Features 99% Al2O3 high-purity alumina with hardness HV 1300 20L volume doubles batch capacity for production efficiency Smooth glazed inner surface for easy cleaning and low contamination Reinforced wall structure withstands heavy media load Customizable with discharge port,