ZRDR CO2 Regulator Low Pressure Replacement Gauge Part # ZRDR-CO2B-LOREG
 
Fits Regulator Models
R100X, R120X
Low Pressure Gauge
See Diagram for Installation (Part B) 
 
Note - If you are in need of the High Presure (Part A)  Order Part # ZRDR-CO2A-HIREG