One-Way Flow Control Valve Grla-1/8-QS-8-Rs-D with Knurled Screw and Lock Nut Valve Function=One-Way Flow Control Function, Pneumatic Connection, Port 1=Qs-8, Pneumatic Connection, Port 2=G1/8, Adjusting Element=Knurled Screw, Mounting Type=(* Threaded, * with External (Male) Thread), Festo