CARBO Instruments 2- 1/2" Pressure Gauge, Stainless Steel Case, Liquid Filled, 0-10000 Psi/Kpa, Back Mount 1/4" NPT Reliable And Dampen Pulsation & Vibration Oil, Water, Air, Compressor, Hydraulics, HVAC, Gaseous & Liquid Media That Are Not Highly Viscous Or Crystallizing And Not Corrosive Or Oxidizing To Copper Alloy Parts