Beswick miniature restrictor fittings are the perfect solution for controlling the flow rate of a gas or liquid.  Take a look at our micro drilled orifices that are available in diameters as small as 0.004” in brass and stainless steel.  Drilled orifice fittings are held to a tolerance of +/- 0.0005” and are an excellent choice for the majority of applications.  With 50+ standard orifice sizes of each type to choose from, and the capability of making custom sizes and configurations, Beswick is sure to have the miniature orifice fitting you'll need to achieve the flow rates you require.  These tamper resistant restrictors are laser marked with the orifice diameter for easy identification.