Norell select series NMR tube with 5 mm NMR valve.

• Negative pressure/high vacuum, leak tested to 10⁻⁹ mbar L/sec
• Internal positive pressure 5 bar (72 psi)

Handle your NMR sample without flame sealing your tubes. Teflon covered O-Ring eliminates material incompatibilities and completely greaseless Teflon assembly means the tube is easy to use and to disassemble for cleaning. Includes female joint for quick attachment to your vacuum rack.