The pressure gauges are designed to measure pressure of gas, liquid which isn't corrosive to brass.

Stainless steel case, brass internal, filled with glycerine.

Pressure range Available:

-30 InHg to 30 psi -1 to 2 bar

0-15 psi  0-1 bar

0-30 psi  0-2 bar

0-60 psi  0-4 bar

0-100 psi  0-7 bar

0-160 psi  0-11 bar

0-200 psi  0-14 bar

0-300 psi  0-20 bar

0-600 psi  0-40 bar

Scale: double scale, easy to read

Accuracy: +/-3-2-3

Dial: 2"

Dial: aluminum

Pointer: aluminum

Made to ASME B40.100 standard.