Specifications:

a) Spring pipe type
b) 37mm max diameter, or by customize.
c) Selectable scope of threads: M10 x 1, 1/8"NPT for different usages
d) If required, the dial design can be made by your need.
e) Every indicator undergoes the following tests:
1) Over pressure
2) Water resistance
3) Pressure resistance
4) Visual inspection

We have been a leading manufacturer and exporter of Fire Extinguisher Pressure Gauge in China