NMR Tube Valve, Complete, European Style, each

NMR Tube Valve, Complete, European Style. This lightweight and symmetrically balanced valve is designed to be sealed to the top of either 5mm or 10mm OD NMR tubes. The O-rings on the barrel and top stem are protected with PTFE wipers. Upper portion of the stem is extended with an additional o-ring for attachment to an adapter or the attachment tube. The attachment tube can be sealed to any standard taper joint. This feature allows for a sample to be dispensed directly from a vacuum line port into the NMR tube. Valve is tooled on 8mm OD standard wall Tubing. Complete valve consists of a glass body, TFE plug and control knob and plain upper attachment tube. Made in the United States.