Pressure Regulator MS4-Lrb-1/4-D7-As for Manifold Assembly, 12 bar Maximum Output Pressure, with Pressure Gauge, Lockable Regulator Head, P2 Connection at Rear. Size=4, Series=MS, Actuator Lock=(* Rotary Knob with Lock, * with Accessories, Lockable), Assembly Position=Any, Design Structure=(* Directly-Controlled Diaphragm Regulator, * with Looped-Through Compressed Air Supply), Festo