Flange Plug Caps for Test TubesSturdy polyethylene caps designed to provide a secure seal Designed with two flexible flanges to help provide a firm fit for superior leak resistance Available in a variety of sizes for optimal versatility LabChoice Flange Plug Caps are crafted from durable polyethylene to help provide a secure seal on a variety of test tubes. These caps feature a double flanged design to offer superior leak resistance compared to standard plug caps. LabChoice Flange
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