Description
NBR stopper, black, is a solid laboratory rubber stopper offering a lower diameter of 21 mm, an upper diameter of 27 mm and a height of 30 mm. The black NBR rubber construction yields a tapered blank plug without bores, intended for secure closure of flasks, bottles and comparable laboratory openings within this size band. Its undrilled design suits applications that require a full seal rather than tubing or instrumentation passages. Net weight is 0,01598 kg, consistent with a compact yet substantial rubber body that maintains a firm friction fit. The stopper forms part of the established family of rubber laboratory stoppers used in parallel with cork, silicone and cellulose types for everyday sealing duties. Clear dimensional specification—21 mm below, 27 mm above and 30 mm high—supports accurate matching to vessel necks. Supplied as one piece and produced by manufacturer Deutsch & Neumann, it is a practical choice for chemical, analytical and educational laboratories seeking a straightforward black NBR stopper in this intermediate diameter range.
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: 21 mm
- Upper diameter: 27 mm
- Height: 30 mm
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Questions about stopper NBR, black, bottom diameter: 21 mm top diameter: 27 mm height: 30 mm
What is this article?
stopper NBR, black, bottom diameter: 21 mm top diameter: 27 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. 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.
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.
