This is a Ashcroft pressure gauge comparator pump and gauges in very clean operating condition.  This model uses distilled water and is commonly used for testing oxygen gauges.  Three gauges are included with this kit.  We tested the unit up to 5000PSI and it held the pressure for 2 days with no leaks.  The pump, gauges and case are in excellent condition.  

This Unit is set up for distilled water for calibrating OXYGEN GAUGES.

• 2-stage hydraulic pressure pump with integral shuttle valve.
  
• 0-10,000 psig (0-70,000 kPa) maximum.
• O Option for oxygen service: Distilled water
• O-Ring Material:Buna-N
• Includes Three Guages.   0 to 150 psi, 0 to 600 psi, and 0 to 5000 psi ranges. One offset adapter Pipe.
• The new similar model is 1327DGO-50
• good for calibration of 1% F.S. industrial service gauges where a 4:1 accuracy ratio must be maintained.