BOLL DPI 0550002 TYP 4.36.2 P=0.5 Differential pressure indicator for sale ideal diesel marineBOLL& KIRCH DIFF PRESS INDICATOR GE 4.36.2 FO AUTO FILTER 6U2817016 AUTO BACK-FLUSHING FILTERS 6.72.1 ,page 84-90. BOLL& KIRCH Type 4.36.2