Found this on the FASS website
FILTER CROSS REFERENCE SHEET
Cross Reference List for the FASS 150 Series Fuel Filter
Recommended Fuel Filter Media: Stratapore™ or Microglass
BRAND Part # Micron Rating Material
FASS FF-1010 10 Stratapore™
FASS FF-1003 3 Stratapore™
CIM-TEK 70032 10 Microglass
CIM-TEK 70213 3 Microglass
Fleetguard HF6601 8 Cellulose/Synthetic
Fleetguard HF6610 16 Cellulose
Fleetguard HF6613 12 Microglass
Fleetguard HF6607 6 Microglass
Fleetguard HF6604 3 Microglass
Caterpillar 3T8642