Description
Cork stopper with top diameter 12 mm, bottom diameter 9 mm and length 17 mm is a tapered natural-cork laboratory stopper for closing flasks, bottles and similar glassware. Its conical profile seats firmly in openings sized between the stated upper and lower diameters, making it suitable for routine sample holding, simple preparative work and general containment in teaching, research and analytical laboratories. Natural cork offers a classic, compressible seal that is straightforward to fit and withdraw during daily bench operations. With a net weight of approximately 0,001 kg per piece, the stopper is a light, practical consumable. Packs of 200 pc(s) from manufacturer Witeg supply laboratories that need larger quantities of standardised closures. The defined geometry—12 mm top Ø, 9 mm bottom Ø and 17 mm length—helps users select the correct size against common neck dimensions. These cork stoppers are intended for standard laboratory conditions and non-aggressive media and sit alongside rubber and silicone alternatives in everyday lab sealing applications.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 200 pc(s)
- Material: Cork
- Top diameter: 12 mm
- Bottom diameter: 9 mm
- Length: 17 mm
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Questions about Cork stopper Ø top 12mm Ø bottom 9mm length 17mm
What is this article?
Cork stopper Ø top 12mm Ø bottom 9mm length 17mm is the article on this page. Luminix Health distributes Witeg 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.