Why are there two numbers for the grit size? Both of those the ANSI grit standard from the US along with the FEPA grit standard in Europe relate to an average particle size, but use slightly different measurement methods. CarbiMet grinding papers offer you rapid grinding times with nominal surface https://www.facebook.com/permalink.php?story_fbid=pfbid05B5NsVb7B6tL8oK3RNyTBDmn2BkeJRKdCpLrV2Ba1NqhRXEXzaCw1mm1PYHeVpayl&id=61562415773754&__cft__[0]=AZU71z4e4v0RrbhwcBFAKnAb-bgop12lLD5xzvzJ4I1yGolDJo-bYUyTaw3rgclo565KY_hpMb_nQ7Y80BCPV2T8MUt85ipd4J7ve04pYU615diQfAyJJkSpOyQF13vCVr5EImjfHSLzs9jD8C0Ndh4GV4nyZNkTjU2Pcv6sL13IYPrh-h7TSiMSM0gDCWTdDtspANKYKd0WfD27RXk_efQd&__tn__=%2CO%2CP-R