Description
Rubber stopper with top diameter 22,5 mm, bottom diameter 17,5 mm and height 23 mm is a solid tapered laboratory stopper for sealing flasks, bottles and similar vessels in routine laboratory work. Made from red natural rubber, it offers the elasticity and grip needed for a secure fit in common neck openings, helping to reduce evaporation and contamination during handling or short-term storage. Red natural-rubber stoppers remain a standard choice in general chemistry, teaching labs and everyday sample preparation where a reliable mechanical closure is required. Supplied as a pack of 20 pieces from manufacturer Labbox, the set is convenient for stocking benches and shared laboratory stores. Net pack weight is 0,215 kg. The tapered profile—broader at the top and narrower at the bottom—eases insertion and withdrawal while maintaining adequate sealing surface. These stoppers sit within the familiar rubber-stopper category used alongside cork, silicone and cellulose options when natural rubber is preferred. Precisely stated dimensions of 22,5 mm upper diameter, 17,5 mm lower diameter and 23 mm height support consistent selection against existing glassware inventories in research, quality-control and educational settings.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 20 pc(s)
- Material: red natural rubber
- Top diameter: 22,5 mm
- Bottom diameter: 17,5 mm
- Height: 23 mm
- EAN: 8434868106857
- GTIN: 08434868106857
- Technical Information Sheet:
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Questions about Rubber stopper, solid, Øtop. 22,5 mm, Øbottom 17,5 mm, h 23 mm, 20 pcs
What is this article?
Rubber stopper, solid, Øtop. 22,5 mm, Øbottom 17,5 mm, h 23 mm, 20 pcs is the article on this page. Luminix Health distributes Labbox 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.