Description
Test tube NS 12/21 is a laboratory test tube with a standard ground joint NS 12/21, an outer diameter of 16 mm and a length of 150 mm. It is suited to routine sample handling, small-scale reactions and general bench work where a reliable conical joint interface is required. The NS 12/21 joint enables connection to matching stoppers, adapters and other jointed glassware, supporting modular assembly of simple apparatus. Supplied as a single piece and weighing 0,035 kg, the tube is practical for individual replacement or for completing existing glassware sets. This test tube from manufacturer ROTH SELECTION belongs to the laboratory glass, vessels and consumables range used in analytical, teaching and research environments. Clearly defined joint size, diameter and length make it straightforward to select the correct format for distillation setups, reflux arrangements or temporary sample containment under jointed closures. Laboratories that standardise on NS joints benefit from ready interchangeability with complementary components already in daily use.
This article is part of Test tubes, in Tubes & vials.
Key features
- Pack size: 1 pc
- Type: Test tube
- Ground joint: NS 12/21
- Diameter: 16 mm
- Length: 150 mm
- Weight: 0,035 kg
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Questions about Test tube, NS 12/21, Ø 16 mm, L 150 mm, 1 unit(s)
What is this article?
Test tube, NS 12/21, Ø 16 mm, L 150 mm, 1 unit(s) is the article on this page. Luminix Health distributes Carl Roth 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.
Which category should I open next?
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.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
