Description
CR stopper, reddish-brown, is a solid rubber laboratory stopper designed for secure sealing of laboratory glassware and vessels. It offers a bottom diameter of 18 mm, a top diameter of 24 mm and a height of 30 mm, giving a tapered geometry that seats firmly in matching openings. Supplied without bores, the stopper is suited to full-closure tasks where tubing passages are not needed. The rubber material combines flexibility with a dependable seal against liquids and vapours, supporting repeated handling in daily lab work. Pack size is 1 piece, with a net weight of 0,01375 kg. These CR stoppers from manufacturer Deutsch & Neumann are practical consumables for chemistry, biology and general laboratory workflows. The distinctive reddish-brown colour helps distinguish them from other stopper grades at a glance. They are appropriate for flasks, bottles, tubes and comparable containers requiring a reliable temporary or longer-term seal.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- 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. 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.