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The classic...
The original design was introduced to improve safety compared to standard screw-cap microtubes. The classic uses a square section washer that compresses tightly between the cap and the top of the tube wall.
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Feel the seal...
With this vial you can actually feel when the cap is securely closed, making it ideal when storing in large batches. In fact, as the cap is closed the o-ring is compressed inside the vial and seals tightly against the inside of the tube. Feel the quality! |
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Ultimate security...
With this vial, the square section sealing washer and internal cap flange provide the highest level of security. Because the washer is enclosed on all four sides, the more you screw the cap down the tighter the seal gets. A long internal flange, meanwhile, prevents contamination of the cap screw threads and the sealing washer. |
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