FSG300 Fire Sprinkler Gauge Air/Water 300 PSI UL/FM - Fire Safety Supply
Amazon.com: New Stainless Steel Liquid Filled Pressure Gauge WOG Water Oil Gas 0 to 300 PSI Center Back Mount 0-300 1/4" NPT Male 2.5" FACE DIAL for Compressor Hydraulic AIR Tank :
Powermate 300 psi Pressure Gauge 032-0025RP - The Home Depot
Hypro® 2.5" Liquid Filled 0-300 PSI U-Clamp Pressure Gauge - North Ridge Fire Equipment