Description
Stopper CR reddish-brown is a tapered rubber laboratory stopper designed for sealing flasks, bottles and related vessels in everyday laboratory practice. It offers a bottom diameter of 18 mm, a top diameter of 24 mm and a height of 30 mm, creating a conical profile that fits firmly into matching openings. A single central borehole of 4 mm diameter allows tubing, probes or comparable inserts to pass through while the rubber body maintains the seal. The stopper is manufactured from rubber in a distinctive reddish-brown colour and is suited to general chemistry, biology and analytical applications requiring a standard one-hole plug. Net weight is 0,013 kg per piece. This stopper CR from manufacturer Deutsch & Neumann is supplied in packs of 100 pieces, facilitating convenient replenishment for routine sealing tasks. With its 18 mm lower diameter, 24 mm upper diameter, 30 mm height and 4 mm bore, the stopper aligns with common laboratory glassware dimensions and supports repeatable, secure closure without additional fittings. It belongs to the established range of rubber stoppers used for temporary or semi-permanent sealing in research, teaching and quality-control laboratories.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Material: Rubber
- Colour: Reddish-brown
- Bottom diameter: 18 mm
- Top diameter: 24 mm
- Height: 30 mm
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Questions about stopper CR, redbrown, bottom diameter: 18 mm top diameter: 24 mm height: 30 mm
What is this article?
stopper CR, redbrown, bottom diameter: 18 mm top diameter: 24 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.
