Description
NR stopper, red, is a tapered rubber laboratory stopper with a lower diameter of 14 mm, an upper diameter of 18 mm and a height of 20 mm. It is fitted with a single central bore of 3 mm diameter, allowing tubing, probes or glass inserts to pass through while the body maintains a secure seal on the vessel neck. Manufactured from flexible rubber and finished in red for easy visual identification, the conical profile supports reliable seating in matching flask, bottle and tube openings. Net weight is 0,00367 kg per piece. This one-hole stopper from manufacturer Deutsch & Neumann is supplied as a single unit for everyday chemical, biological and analytical bench work. The defined upper and lower diameters together with the 20 mm height give consistent seating depth and interchangeability across standard glassware. Suitable for routine sample handling, temporary closures and general laboratory setups, the rubber construction accommodates repeated insertion and removal without specialised pretreatment. Compact dimensions make it practical for smaller necks and narrow-mouth vessels commonly used in teaching and research laboratories.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Rubber
- Colour: Red
- Lower diameter: 14 mm
- Upper diameter: 18 mm
- Height: 20 mm
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Questions about stopper NR, red, bottom diameter: 14 mm top diameter: 18 mm height: 20 mm
What is this article?
stopper NR, red, bottom diameter: 14 mm top diameter: 18 mm height: 20 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.
