S shamusMember Beta Ratios for Purolator PureONE are:5um = B4.810um = B5015um = B100020um = B1000B2 = below 5umB10 = 6.69umB20 = >8umB75 = >11umB100 = 11.42umFrom Brian Crawford, SR Engr, Purolator; 08/14/09. 11/2/096:04 PM Last edited by shamus 11/2/097:01 PM