Wilmad^® quick pressure valve NMR tube 5 mm diam. 

Specially designed to simplify the work of NMR scientists performing catalytic, gas-liquid phase reactions, air sensitive samples, and elevated temparature studies using low boiling point solvents and can be used for EPR spectrometry too. The Quick Pressure Valve can also be attached to a quartz sample tube for EPR by using a graded seal that connects the Pyrex portion of the valve to the quartz tube. QPV tubes have been successfully tested for performance at 300 psi.
• Easy to operate - one turn to open, one turn to close
• Larger opening for convenient sample addition
• Light weight, concentric design for better performance
• Unions and fittings for both 1/16 in. and 1/8 in. tubing

Wilmad is a registered trademark of SP Industries.