Description
Test tubes 16 x 235 mm NS 14/23 are laboratory glass tubes featuring a standard ground joint NS 14/23 and supplied with matching NS-PE stoppers. Manufactured from DURAN tubing, these round-bottom, ungraduated tubes provide reliable chemical resistance and thermal stability for sample handling, reactions and short-term storage. With a diameter of 16 mm and length of 235 mm they offer useful working volume while the ground joint ensures a secure seal with the polyethylene stopper. Available in packs of 10 pieces from manufacturer Witeg, the tubes suit routine chemistry, analytical work, sample preparation and teaching laboratories where durable borosilicate glassware is required. The clear ungraduated wall permits unobstructed visual inspection of contents and the round bottom supports even heat distribution when gentle heating is applied. These robust glass test tubes form a practical staple for research, quality-control and educational workflows needing dependable NS-joint glassware.
This article is part of Test tubes, in Tubes & vials.
Key features
- Pack size: 10 pc(s)
- Dimensions: 16 x 235 mm
- Joint size: NS 14/23
- Material: DURAN tubing
- Bottom: Round bottom
- Stopper type: NS-PE stopper
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Questions about Test tubes 16 x 235mm ST 14/23
What is this article?
Test tubes 16 x 235mm ST 14/23 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Test tubes, inside Tubes & vials, in Labware.
A test tube is the open cylindrical vessel for a small liquid, in borosilicate glass or in plastic. Rimmed and rimless mouths differ. The size is diameter by length. It is not graduated for a result, and a glass tube that will be centrifuged has a force limit.
A tube holds a small sample upright. A test tube is the open glass or plastic cylinder. A centrifuge tube is conical so a pellet forms at the tip, and it is rated for a centrifugal force the rotor will actually reach. A vial is a small closed bottle, often for a sample that will sit in an instrument. NMR tubes are a special case: the glass has to be uniform or the spectrum is the tube, not the sample. Laboratory ware is listed under ISO laboratory glassware.
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The category is Tubes & vials. The sub-category is Test tubes. The catalogue is Labware.
Shelves beside this one are Centrifuge tubes (conical), Sample vials & NMR tubes and Tube & vial accessories.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.