One-Way Flow Control Valve Grla-1/2-QS-12-Rs-D with Knurled Screw and Lock Nut Valve Function=One-Way Flow Control Function, Pneumatic Connection, Port 1=Qs-12, Pneumatic Connection, Port 2=G1/2, Adjusting Element=Knurled Screw, Mounting Type=(* Threaded, * with External (Male) Thread), Festo