Harris 801 Oxygen Acetylene or LP Cutting Welding Regulator Set. It comes with oxygen & acetylene regulators.  The oxygen regulator is standard CGA 540 for all industrial oxygen tanks.  The acetylene tank is CGA 510.  It fits POL acetylene tanks with a female fitting & LP or propane tanks. 

This acetylene regulator will not fit acetylene port a torch tanks, B acetylene tanks or any acetylene tanks with male fittings.

Features:

Harris 801 Oxygen Regulator 801-80-540

• Working pressure: 0-80
• Supply pressure: 0-4000
• 2" Gauges with Steel Case
• Brass Body
• Standard B Sized Outlet
• CGA 540 Inlet

• Working pressure: 0-15
  
• Supply pressure: 0-400
  
• 2" Gauges with Steel Case
  
• Brass Body
  
• Standard B Sized Outlet.  9/16-18 left-hand thread.
  
• CGA 510 Inlet