This is a diaphragm service replacement for the following products:

RADIUM MPR (multi-pump regulator)
RADIUM MPR-RA (multi-pump regulator)
RADIUM FST-R (fuel surge tank regulator)
RADIUM FSTR-RA (fuel surge tank regulator)
RADIUM DMR (direct mount regulator)
RADIUM DMR-RA (direct mount regulator)
RADIUM FPR-D (fuel pressure regulator damper)
RADIUM FPRD-RA (fuel pressure regulator damper)
RADIUM PUMP HANGERS with built-in FPRs (all)