... Strong hardness 2)High precision, good surface diameter : 0.5mm--50.8mm About us Brand NamePlace of OriginStandardxinxinShan dong China ( ... , YG6X , YG8 , YG8X , YG10 tungsten carbide Size0.5-100mmGrade G10 - G100Hardness HRC90-92Applicationsgrinding, bearings, hardness examine machine, ... on product; 4/ good traning export sales person; 5/ skilled in tungsten carbide sell; 6/ could issue ...