DIESEL SPIN-ON SERIES REPLACEMENT FILTER ELEMENT (RACOR)
COLOR: Blue. MICRON: 10. FITS: 120A.
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)