Description
Rubber stopper with top diameter 19 mm, bottom diameter 14 mm and height 21 mm is a tapered laboratory closure intended for sealing flasks, bottles and similar glassware. Manufactured from red natural rubber, it combines elasticity with a classic conical profile that seats firmly in a useful range of neck openings. The upper diameter of 19 mm and lower diameter of 14 mm give a practical taper for insertion and removal, while the 21 mm height provides enough body for secure handling at the bench. A pack of 25 pieces supports routine stocking of teaching laboratories, quality-control stations and general research workspaces where simple, reusable gum stoppers remain everyday consumables. These stoppers from manufacturer Labbox are suited to non-critical sealing tasks in chemistry, biology and sample-preparation workflows. The red natural-rubber construction offers the resilience expected of traditional laboratory gum stoppers. Net pack weight is 0,165 kg. Use them wherever a straightforward tapered rubber plug is required for temporary or repeated closure of standard laboratory vessels without additional fittings.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 25 pc(s)
- Material: Red natural rubber
- Top diameter: 19 mm
- Bottom diameter: 14 mm
- Height: 21 mm
- EAN: 8434868045385
- GTIN: 08434868045385
- Technical Information Sheet:
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Questions about Rubber stopper, solid, Øtop. 19 mm, Øbottom 14 mm, h 21 mm, 25 pcs
What is this article?
Rubber stopper, solid, Øtop. 19 mm, Øbottom 14 mm, h 21 mm, 25 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.