This 60 psi air compressor hydraulic pressure gauge features a 2" face and 1/4" NPT side mount. This pressure gauge can be used to measure air, water, oil, gas and any other non-corrosive to brass. It can also be a perfect pressure gauge for swimming pool filter. This pressure gauge adopted a dual scale design, clear number for easy and convenient reading. The housing is made of metal, provides good protection for the inner part, durable, high temperature resistance, shock resistance and corrosion resistance. Easy operation: Bottom mounting, no additional tools are needed, can be installed easily.