Our PEEK Micro-Metering Valve assembly is designed for the control of fluid flow rates. These needle valves are ideally used with peristaltic pumps, pump fluid-transfer, mass spectometry and fraction collection. It has a 1/4-28 Flat-Bottom port configuration and is for 1/16"OD tubing. It includes (2) P-230 Flangeless Fittings. It is also available without Fittings.