Our Large Bore Union is designed specifically to be used with our standard 1/2-20 Flat-Bottom threaded nuts and ferrules. Our union can create a true zero dead volume (ZDV) connection when partnered with Quick Luer Adapters and the appropriate ferrule. It is manufactured from biocompatible PEEK giving is excellent chemical resistance to virtually all commonly used solvents. It has a swept volume of 1.4µL and is for 5/16″ OD tubing. It comes in natural color. Brochure