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Magnetic Screw Cap for Headspace Vials, 18 mm thread, PTFE/silicone septum (white PTFE/tranparent blue silicone), septum thickness 1.3 mm, pkg of 100 ea
Magnetic Screw Cap for Headspace Vials, 18 mm thread, PTFE/silicone septum (white PTFE/blue silicone), septum thickness 1.5 mm, pkg of 100 ea
Magnetic Screw Cap for Headspace Vials, 18 mm thread, PTFE-faced butyl septum (grey PTFE/red Butyl), septum thickness 1.6 mm, pkg of 100 ea