1/4" NPT, Filter Regulator, Mini Poly Bowl Air Filter & Regulator, Removes Water & Particles To Protect Air Tools, Compact Filter/Regulator Duo Combines Functions To Make Effective Use Of Limited Space, Cast Aluminum Body Construction Resists Corrosion, Locking Adjustable Pressure Knob Maintains Consistent Pressure Setting & Mounting Bracket Makes Installation Easy, 40 Micron Bronze Sintered Filter Element, Dial Pressure Gauge & Automatic/Manual Full Time Fluid Drain, 1/4" NPT On Both Inlet & Outlet, Polycarbonate Bowl Features A Transparent View Of Fluid Level With 1.4 OZ Capacity, Push To Connect Drain Tubing Connection Channels Water Safely Away, Operating Temperature Range Between 25 Degrees Fahrenheit & 140 Degrees Fahrenheit.