These high-quality glass test tubes make for an excellent addition to any labware collection!
Choose from sizes small to extra-large in these round bottom borosilicate test tubes with beaded rims. Compared to rimless test tubes, beaded rims add strength and assist in handling.
The large 16x150mm borosilicate glass test tubes are 150 mm tall x 16 mm with 14 mm inside diameter. Approximate volume is 22 ml. Use with No. 0 rubber stoppers or No. 4 cork stoppers. This size is the best for general use.
These glass test tubes are made of borosilicate glass that's similar to Pyrex or Kimax, and they have clear marking spots for your lab labeling needs. Compared to clear plastic test tubes, these glass culture tubes / sample tubes have greater chemical resistance and can be heated directly in an open flame.
Since test tubes do not have flat bottoms, a test tube rack is essential in order to keep them upright during your experiments!
Looking for a more kid-friendly test tube set? Check out this 6-pack of plastic test tubes that comes with screw caps; it works perfectly for students as young as 5 years old.
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