Our company was founded 1997,passed ISO9001:2000 in 2005,we have two sub companies,SHANDONG ULTRAMING FINE CERAMICS CO.,LTD and ZIBO RYLONG CERAMIC MATERIAL CO.,LTD.Main products: alumina grinding all,ZTA grinding media,zirconia silicate grinding ball,zirconia grinding ball,alumina brick and lining,alumina chemical filler materils