Suction Pressure Guage Model GES, Direct Mounting type, Range: -30in Hg- 300psi/ -1-20bar(Dual scale type psi & bar), Dial size: 100mm, Full SS, 1/4"NPT Bottom Connection, with liquid filled - MASS | Union
Pressure Gauge 40mm 1/8 BSPT Rear Back 15-300 PSI & Bar for Air Gas Wate Fuel - AliExpress
2-1/2 inch Pressure Gauge, glycerine, 0-300 psi/bar/Kpa, 1/4 BSP back
25-911-300-psi/bar - NOSHOK - 900 Series Acrylonitrile Butadiene Styrene (ABS) and Stainless Steel Liquid Filled Pressure Gauges | Hydradyne LLC