Description
The burette stopcock for 10 ml, solid straight, DURAN is a precision glass stopcock intended for 10 ml burettes used in volumetric analysis and titration. It features a straight, solid design with NS 12,5 joint, a bore of 1,6 mm and construction from DURAN tubing, conforming to DIN 12541. The material is borosilicate glass 3.3 under the DURAN® designation, offering the chemical and thermal resistance expected of laboratory borosilicate ware. Supplied as 1 pc with a net weight of 0,036 kg, the stopcock serves as a functional component or spare part for matching 10 ml burette assemblies in analytical, quality-control and educational laboratories. The solid plug and defined bore support controlled reagent delivery during standard wet-chemistry procedures. This stopcock from manufacturer Witeg fits workflows that rely on standardised ground joints and DURAN glassware. Its straight geometry aids straightforward mounting and maintenance on compatible burette bodies, making it a practical choice for laboratories that maintain or equip small-volume titration setups.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Configuration: Straight, solid
- Joint size: NS 12,5
- Bore: 1,6 mm
- Standard: DIN 12541
- Material: Borosilicate glass 3.3 (DURAN®)
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Questions about Stopcocks for burettes solid ST 12,5
What is this article?
Stopcocks for burettes solid ST 12,5 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Stopcocks & valves, inside Tubing, hoses & fittings, in Labware.
A stopcock opens and closes a line, or directs it between ports. Glass stopcocks have a ground plug that needs grease or a PTFE key. The bore decides the flow. A two-way and a three-way key are different parts.
Tubing is how a liquid or a gas moves between two vessels without being poured. Silicone stays flexible and survives repeated autoclaving. PTFE resists almost every solvent and is stiff. PVC is the ordinary flexible line for water and for mild aqueous work. The fitting, not the tube, is what usually leaks: the barb, the thread and the stopcock have to match the tube bore. Glass and plastic apparatus around these lines is indexed under ISO laboratory ware.
Which category should I open next?
The category is Tubing, hoses & fittings. The sub-category is Stopcocks & valves. The catalogue is Labware.
Shelves beside this one are Hose connectors, adapters & fittings, PVC, PTFE & other tubing, Silicone tubing and Tubing 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.

