Pack of two test tubes. 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.
Note: Due to supply limitations, these test tubes may not have the white marking spots shown in the photo.
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