Description
Test tubes 19 x 220 mm NS 14/23 are precision laboratory glassware intended for sample preparation, reactions and temporary storage in chemical and biological workflows. Each tube is manufactured from DURAN tubing, providing the well-known chemical durability and thermal shock resistance of borosilicate glass. The design incorporates a round bottom for even heating and an ungraduated plain wall, together with a matching NS-PE stopper that seals the NS 14/23 ground joint securely. Supplied in convenient packs of 10 pieces from manufacturer Witeg, the tubes measure 19 mm in diameter by 220 mm in length and have a net weight of 0,032 kg per piece. The standardised ground joint permits direct connection to other NS glassware components such as condensers or adapters, making these tubes versatile for distillation set-ups, reflux reactions or simple sample containment. Their robust construction supports repeated use under typical laboratory conditions while remaining easy to clean and autoclave. Ideal for teaching laboratories, research benches and quality-control environments that require reliable, interchangeable glassware of consistent dimensions.
This article is part of Test tubes, in Tubes & vials.
Key features
- Pack size: 10 pc(s)
- Dimensions: 19 x 220 mm
- Joint size: NS 14/23
- Stopper type: NS-PE stopper
- Bottom shape: Round bottom
- Graduation: Ungraduated
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Questions about Test tubes 19 x 220mm ST 14/23
What is this article?
Test tubes 19 x 220mm 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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