Quick reference chart: International Standardization of Grit Sizes for Diamond and Cubic Boron Nitride (CBN)
International Standards Organisations: FEPA, DIN, ISO, ASTM
FEPA (Federation of European Producers of Abrasives) – https://www.fepa-abrasives.com/
DIN (Deutsches Institut für Normung, German Institute for Standardization) – https://www.din.de/en
ISO (International Standards Organisation) – https://www.iso.org/home.html
ASTM (American Society for Testing and Materials) – https://www.astm.org/
