These versatile tubes integrate secure screw-cap closure with septum sampling capability, enabling material addition or removal without tube opening. Each tube features a PTFE-sealed closure system that provides reliable containment with convenient access.
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Complete assembly includes an open-top polypropylene screw cap with PTFE/silicone septum, optimized for clean, reliable penetration using standard 22-gauge needles.
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• Complete closure system: open-top polypropylene screw cap with PTFE/silicone septum
• Chemical compatibility: inert to most organic solvents and compounds (not suitable for strongly corrosive materials)
• Usage limitation: designed for single or limited puncture applications