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Everything you need for test tube experiments! This set contains 6 glass test tubes, a rack, cleaning brush, stoppers and clamp.
Test tubes are made of high-quality borosilicate glass (just like Pyrex or Kimax) that can be heated directly in an open flame. 150 mm tall x 16 mm OD with 14 mm inside diameter. Approximate volume is 22 ml. Uses No. 0 stopper or No. 4 cork.
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