Description
Stopper CR reddish-brown is a tapered rubber laboratory stopper intended for sealing flasks, tubes and other vessels in routine laboratory work. It has a bottom diameter of 14 mm, a top diameter of 18 mm and a height of 20 mm, giving a conical profile that seats firmly in matching openings. A single central borehole of 3 mm diameter runs through the stopper, allowing tubing, probes or similar inserts to pass while the rubber body maintains the seal. The material is rubber in a characteristic reddish-brown colour, suited to general chemistry, biology and analytical set-ups where a standard one-hole plug is required. Net weight is 0,00507 kg per piece. This stopper CR from manufacturer Deutsch & Neumann is offered as a single piece and fits everyday sealing tasks on small glassware. The defined upper and lower diameters together with the 20 mm height and 3 mm bore support consistent, repeatable closure of laboratory apparatus without additional fittings. It belongs to the common 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: 1 pc
- Material: Rubber
- Colour: Reddish-brown
- Bottom diameter: 14 mm
- Top diameter: 18 mm
- Height: 20 mm
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Questions about stopper CR, redbrown, bottom diameter: 14 mm top diameter: 18 mm height: 20 mm
What is this article?
stopper CR, redbrown, 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.
