Description
Stopper NR red is a solid rubber laboratory stopper designed for reliable sealing of glassware and laboratory apparatus. With a lower diameter of 5 mm, an upper diameter of 9 mm and a height of 20 mm, the tapered form ensures a firm fit in correspondingly sized necks and openings. The stopper is produced from rubber in a clear red colour and is supplied without boreholes, making it suitable for applications that require an unperforated closure. A net weight of 0,00091 kg combines low mass with practical durability for everyday laboratory handling. Supplied as a single piece, this stopper from manufacturer Deutsch & Neumann forms part of a standard norm-stopper series widely used with flasks, test tubes and similar vessels. Its conical profile allows straightforward insertion and removal while delivering an effective seal that helps prevent leakage or contamination. Research, teaching and quality-control laboratories rely on these red NR rubber stoppers whenever consistent mid-range dimensions and solid rubber performance are needed for sample preparation, storage or experimental setups.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Rubber
- Colour: Red
- Lower diameter: 5 mm
- Upper diameter: 9 mm
- Height: 20 mm
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Questions about stopper NR, red, bottom diameter: 5 mm top diameter: 9 mm height: 20 mm
What is this article?
stopper NR, red, bottom diameter: 5 mm top diameter: 9 mm height: 20 mm is the article on this page. Luminix Health distributes Deutsch & Neumann for laboratory use. It sits in Rubber & silicone stoppers, inside Stoppers, caps & closures, in Labware.
A rubber or silicone stopper is pushed into a mouth. The size number corresponds to a top and bottom diameter. Silicone survives higher temperatures and more autoclave cycles. Natural rubber is attacked by oils and by some solvents.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Rubber & silicone stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Ground-joint glass stoppers, Lids & seals and Closures (other).
What should I check before I order?
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.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. 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.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.