Black silicon carbide grit F grade 20-220#; sic90% and 97%min grains sized in 0-1mm,1-3mm,3-5mm,1-10mm, sic80%-88% etc Black silicon carbide sic 98.5%minsize: F 24-240 sic 97%minsize: 0-1, 1-3, 3-5mm, 0-20mm, 0-50mm(the size and size distribution will be done based on customers' requirement.)