... /320 /500/800#Diameter:4''/7''/8''/10''/12''Stone Grinding Brushes(steel wire: 0#)Frankfurt, fickert, round/circle ... shape; polishing granite, marble, ceramic,patent stone is made of Dupont, nanometer strenghten with high neat silicon ... , arm polishing machine, levitator etc. Processing nature stone, glass brick and crystallite stone to make satin face mercerization and anti-skidding ...