Description
CR rubber stopper, reddish-brown, is a tapered laboratory stopper offering a bottom diameter of 17 mm, a top diameter of 22 mm and a height of 25 mm. Made from rubber and finished in the characteristic reddish-brown tone, it incorporates two bores of 4 mm diameter for the insertion of tubing, electrodes or glassware while preserving an effective seal. The conical geometry provides a firm, leak-resistant fit on a variety of vessel necks used in synthesis, sample preparation and general laboratory practice. Packaged in units of 100 pieces, each stopper weighs 0,00923 kg net, facilitating straightforward inventory management for teaching labs and research groups. These CR stoppers from manufacturer Deutsch & Neumann form part of the established rubber-stopper assortment and are intended for everyday sealing applications that benefit from the elasticity and durability of rubber. The dual 4 mm bores enable parallel connections in simple gas-washing, distillation or aeration assemblies without additional fittings.
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: 17 mm
- Top diameter: 22 mm
- Height: 25 mm
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Questions about stopper CR, redbrown, bottom diameter: 17 mm top diameter: 22 mm height: 25 mm
What is this article?
stopper CR, redbrown, bottom diameter: 17 mm top diameter: 22 mm height: 25 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.