A B Bowl Material: Zinc, with a Polycarbonate sight gauge , Diaphragm Material: Nitrile, Zinc , Diaphragm Type: Spring loaded , Drain Type: Automatic mechanical with float , Element Retainer Material: Acetal , Filter Element Material: Sintered Polyethylene , Filter Element Standard Filtration: 5 micron , Filter Element Type: Particulate , Fitting Size: 1/2" , Fitting Type: Quick-Connect Hansen , Inlet Size: 3/4" , Knob Material: Acetal , Outlet Size: 1/2" , Pressure Gauge Range: 0 to 300 psi , Pressure Gauge Type: Analog , Relief Valve Material: Brass , Relief Valve Type: Spring loaded (external) , Seal Material: Nitrile , Stand Finish: Powder Coated , Stand Material: Steel , Style: Portable/ Fixed , Valve Type: Balanced valve design