Why are there two numbers for your grit size? Both of those the ANSI grit standard within the US as well as FEPA grit standard in Europe relate to an average particle size, but use slightly different measurement methods. For off state stress protection by deep p-areas is adopted, for https://www.facebook.com/permalink.php?story_fbid=pfbid02jb53zu37QofZaLs88eBqzFXUb2bsn9emnCe9SDetdXnMhjyKp2T8VSzPYq63sA8fl&id=61562415773754&__cft__[0]=AZV9GJ-yMKq9mQddCX42hzY0H0Jr9efr-31TAcozHBw-WUp2v0TfBoDMTy68ehWnU7d5ePACBGBx07whPNqakCxWA1l9NIDJQ_mVerxNagBWZEhewo1iIxjOmdveZZEChgSuXFWuk-KaitLBrX-B6FwtXpAQSyKQgzDVDKijO5Z6J24rfFgo-KEVWY0tgMiVN5gcKi5XC99-GzlyoxpUAPDj&__tn__=%2CO%2CP-R