Alarm Type: Low Pressure 500 to 550 psi Set Pressure, Pneumatic Versions: Whistle, Electronic Versions: Red Indicator, Audible Alarm, Remote Alarm Jack , Check Valve Material: Stainless Steel , Check Valve Pressure: 6000 psi , Frame Finish: Powder Coated , Frame Material: Steel , Length: 21" , Max. Inlet Pressure: 5500 psi , Max. Outlet Pressure: 125 psi , Max. Pressure: 3000 psi, 5000 psi , Outlet Material: Aluminum , Outlet Type: Manifold Block , Relief Valve Pressure: 125 psi , Wheel Type: Pneumatic , Whip Assemblies: 5000 psi, Thermo-Plastic Hose with a 4:1 Safety Factor