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Fits 12mm and 13mm test tubes, and have two flexible flanges to assure a leakproof seal.

  • Caps have two flexible flanges to assure a leakproof seal.
  • Cap fits 12mm and 13mm test tubes, round cuvettes, and centrifuge tubes.
  • Available in natural, blue, green, lavender, orange, red, white, yellow, and an assortment of these 8 colors.



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