Description
NBR stopper, black, is a solid laboratory rubber stopper with a lower diameter of 23 mm, an upper diameter of 29 mm and a height of 30 mm. Formed from black NBR rubber and supplied without bores, it serves as a blank tapered plug for sealing flasks, bottles and other laboratory vessels that accept this diameter range. The absence of holes makes the stopper suitable wherever a complete closure is needed rather than passages for tubing or probes. Net weight is 0,0186 kg, indicating a dense, compact rubber body that seats securely by friction. This item belongs to the standard rubber-stopper category used alongside cork, silicone and cellulose stoppers in general laboratory practice. Defined dimensions of 23 mm at the base, 29 mm at the top and 30 mm overall height allow straightforward selection against vessel openings. Offered as a single piece from manufacturer Deutsch & Neumann, the stopper supports routine sealing work in chemical, analytical and teaching environments that call for a plain black NBR design in this size.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: NBR rubber
- Colour: Black
- Lower diameter: 23 mm
- Upper diameter: 29 mm
- Height: 30 mm
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Questions about stopper NBR, black, bottom diameter: 23 mm top diameter: 29 mm height: 30 mm
What is this article?
stopper NBR, black, bottom diameter: 23 mm top diameter: 29 mm height: 30 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.