Description
NR rubber stopper, grey, lower diameter 21 mm, upper diameter 27 mm and height 30 mm is a solid laboratory stopper intended for sealing flasks, bottles and other glassware. Made from rubber in a neutral grey colour, this tapered NR stopper provides a reliable mechanical seal thanks to its conical profile: 21 mm at the base widening to 27 mm at the top over a height of 30 mm. Supplied without pre-drilled bores (0 holes), it is suited to applications that require a complete closure or where custom boring can be performed later. The compact form and net weight of 0,0163 kg make it practical for routine laboratory work. This stopper from manufacturer Deutsch & Neumann belongs to the standard range of rubber stoppers used in chemical, analytical and research laboratories for sample storage, reaction vessels and general vessel closure. Its grey rubber construction offers the flexibility and grip needed for repeated insertion and removal while maintaining a tight fit in matching neck openings.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc(s)
- Material: Rubber
- Colour: Grey
- Lower diameter: 21 mm
- Upper diameter: 27 mm
- Height: 30 mm
- Technical Information Sheet:
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Questions about stopper NR, grey, bottom diameter: 21 mm top diameter: 27 mm height: 30 mm
What is this article?
stopper NR, grey, 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.
