Description
Stopper NR, grey, with lower diameter 3,5 mm, upper diameter 6,5 mm and height 15 mm is a solid natural-rubber laboratory stopper intended for sealing narrow-neck vessels, tubes and small apparatus. The tapered profile ensures a reliable friction fit in correspondingly sized openings, while the grey rubber compound provides the elasticity needed for repeated insertion and removal without cracking. Manufactured without bores, this solid stopper is suited to applications that require a complete, gas- and liquid-tight closure rather than tubing passages. Net weight is approximately 0,00041 kg, reflecting its compact size for micro-scale and analytical work. Typical uses include temporary sealing of sample vials, reaction tubes and calibration vessels in chemical, pharmaceutical and educational laboratories. The stopper is supplied as a single piece from manufacturer Deutsch & Neumann and belongs to the established NR grey series of laboratory stoppers. Its defined dimensions allow straightforward selection against neck or bore specifications, supporting consistent sealing performance across routine laboratory workflows.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Solid NR rubber stopper
- Colour: Grey
- Lower diameter: 3,5 mm
- Upper diameter: 6,5 mm
- Height: 15 mm
- Technical Information Sheet:
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Questions about stopper NR, grey, bottom diameter: 3,5 mm top diameter: 6,5 mm height: 15 mm
What is this article?
stopper NR, grey, bottom diameter: 3,5 mm top diameter: 6,5 mm height: 15 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.