Norgren excelon b72g modular filter regulator general purpose g1 4 norgren b72g 2gk qt3 rmn this general purpose compressed air filter regulator features a design that allows in line or modular installation with other b excelon b products the filter has high efficiency water and particle removal and there is a quick release transparent polycarbonate bowl adjustment is via a push to lock knob norgren excelon b72g 2gk qt3 rmn compressed air filter regulator g1 4 port