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Screw-Thread, Big Mouth Vial Caps with Red PTFE/Silicone Septa, 0.060" w/Slit, Black, Preassembled, 2.0 mL, 1000-pk.
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Simport T504AQX Polypropylene Septum Screw Cap for Sample Tube (Pack of 250): Science Lab Cap Plugs: Amazon.com: Industrial & Scientific
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Simport T347AQX - X-Septum Screw Caps for Microcentrifuge Tubes / Qty 250 – Distribution LabSphere inc.
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