and the Federation of European Producers of Abrasives (FEPA) regulate sandpaper grit standards. They refer to the size and number of holes in the screens that filter the abrasive particles.

Dunhua Zhengxing Abrasive, as one of the most important professional manufacturers of Boron Carbide in the world, can supply grain sizes according to the standards of FEPA (F4 to F1200), ...