Description
Cork stopper with top diameter 70 mm, bottom diameter 65 mm and length 30 mm is a tapered laboratory stopper for sealing flasks, bottles and similar vessels. Made from natural cork, the conical profile supports a secure fit: the larger upper diameter seats firmly while the narrower base eases insertion into matching openings. The 30 mm length keeps the stopper compact for routine handling yet substantial enough for stable closure during sample storage, temporary sealing or everyday lab work. Each stopper has a net weight of 0,032 kg and originates from Portugal. Offered in a pack of 10 pieces from manufacturer Witeg, the stoppers suit chemical, biological and teaching laboratories that prefer a compressible natural sealing material. The 5 mm taper between top and bottom diameters helps accommodate minor neck variations and maintains friction without extra fixtures. Natural cork remains a practical choice for reusable vessel closure where glassware must be sealed quickly and cleanly. These dimensions place the item in the standard cork-stopper range used across general laboratory applications requiring reliable, simple stoppers.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Material: Cork
- Top diameter: 70 mm
- Bottom diameter: 65 mm
- Length: 30 mm
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Questions about Cork stopper Ø top 70mm Ø bottom 65mm length 30mm
What is this article?
Cork stopper Ø top 70mm Ø bottom 65mm length 30mm 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.