Racor Replacement Element for Diesel Gas Spin - On Fuel/Water Separators, Fits: 230R - Brown

The lower the micron rating, the finer the filtration. Follow your engine manufacturer's recommendation for fuel filter micron rating. S = Secondary/Final 2 micron (Brown cap)T = Primary or Secondary/Final 10 micron (Blue cap)P = Primary 30 micron (Red cap).