Description
NBR stopper, black, with lower diameter 23 mm, upper diameter 29 mm and height 30 mm delivers a secure tapered seal for laboratory glassware and technical vessels. Equipped with one central bore of 5 mm diameter, it readily accepts tubing, sensors or small fittings while preserving an effective closure. The stopper is made from NBR (nitrile butadiene rubber) in black, providing the flexibility and mechanical strength needed for repeated laboratory handling. Its conical form, rising from 23 mm at the base to 29 mm at the top over 30 mm height, matches standard neck openings for a reliable fit. Each unit weighs 0,02106 kg net, remaining practical to insert and remove yet sufficiently solid for regular service. Packaged in units of 100 pieces from manufacturer Deutsch & Neumann, these stoppers support efficient laboratory logistics in research, quality control and teaching environments. They are suitable for general-purpose sealing duties where dimensional precision and NBR compatibility contribute to consistent, leak-free performance.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- 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.