ZSPA-554 Hydraulic Air Pump for Torque Wrench Hydraulic Air/Torque Wrench Pump Powerful 4 hp motor starts under load. Use where air is the preferred source of power. Max. Pressure: 700bar Two speed high performance pump. External adjustable pressure regulator. Retract side internal relief valve protects tool Opt eight 1/4″ ports (include female and male couplers [...]