Why are there two numbers for the grit size? Both equally the ANSI grit standard inside the US and also the FEPA grit standard in Europe relate to a mean particle size, but use slightly different measurement methods. JJISCO offers a wide array of standard and custom silicon carbide products https://www.facebook.com/permalink.php?story_fbid=pfbid0L2JwiNuXB3gi2BKxKpy28dMNDaiSvnPR28Mx29q7t1VkD3GwyFmAyzG1jr5jWNCMl&id=61560512640678&__cft__[0]=AZXEePH-UmbhFJFPrpPe8GAePXI388AW7KkLIMGgtGkjl-4bBDfpNU9KnLhXgwa9D8Gezz7WnHkMAThg_kWkUGAZ8UFK5Qv9CfFsv6z8UpCVDs4p2jxguwvL7TiX8C1zKSvQL7VGngjOy_wNckZtbEPfDcAUfqa4YutJMgdjrpPpU8c4IWCxLMcTXdz3O5MKaIBwWQ-YLG_TB3ew9g7ETj0D&__tn__=%2CO%2CP-R