Body Size: 20, Back Flow: w/o Backflow Function, Thread: Rc, Port Size: 02 (1/4), Mounting: B (w/Bracket), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Pressure Units: Unit on Product Label: MPa,°C, Pressure gauge in SI units: MPa