Clippard MNV-4K2 Miniature Needle Valve, 1/8" Hose Fitting with Knurled Knob, 5 scfm @ 100 psig

Adjustable control needle valves restrict flow in both directions. There are four models offered by Clippard, all with #10- 32 ports, but with various needle configurations to provide coarse or fine flow adjustment. The diagram of needle shapes and the chart on this page show the difference between these models.