Description
CR stopper, reddish-brown, is a solid rubber laboratory stopper intended for dependable closure of glassware and vessels in scientific settings. With a bottom diameter of 21 mm, a top diameter of 27 mm and a height of 30 mm, its tapered form provides a secure fit in corresponding neck sizes. The stopper has zero bores and is therefore suited to complete sealing applications without tubing or probe passages. Rubber construction delivers the elasticity required for easy insertion and removal while preserving an effective barrier to liquids and vapours. Supplied in packs of 100 pieces, each unit has a net weight of 0,01929 kg. These CR stoppers from manufacturer Deutsch & Neumann serve routine needs in chemistry, life-science and quality-control laboratories. The reddish-brown colour supports rapid visual sorting among mixed stopper inventories. They are well matched to flasks, bottles, test tubes and similar containers that require a reliable seal.
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: 21 mm
- Top diameter: 27 mm
- Height: 30 mm
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Questions about stopper CR, redbrown, bottom diameter: 21 mm top diameter: 27 mm height: 30 mm
What is this article?
stopper CR, redbrown, bottom diameter: 21 mm top diameter: 27 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.