Description
Cork stopper, 1a quality, low-pore, 19 x 16 x 23 mm is a tapered natural cork laboratory stopper intended for reliable temporary sealing of glassware. Manufactured from selected cork material in 1a quality with a deliberately low-pore structure, it provides a compressible, form-fitting closure for flasks, bottles, test tubes and similar vessels commonly used in chemical, biological and educational laboratories. The tapered geometry features an upper diameter of 19 mm, a lower diameter of 16 mm and a height of 23 mm, allowing secure insertion into standard neck openings while remaining easy to remove. Supplied as a single piece, this stopper belongs to the classic range of norm stoppers and cork stoppers. The low-pore cork reduces unwanted absorption of liquids or vapours relative to coarser grades and supports clean handling in routine laboratory workflows. Produced by manufacturer Hecht, the stopper offers a traditional, economical sealing solution for research benches, teaching laboratories, sample storage and general laboratory organisation where a natural material closure is preferred. Its straightforward design makes it suitable for both aqueous and many organic media under ambient conditions, provided chemical compatibility of cork is observed.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc(s)
- Material: Cork
- Quality: 1a quality
- Pore structure: Low-pore
- Upper diameter: 19 mm
- Lower diameter: 16 mm
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Questions about Cork stoppers, first-class quality, low-porous Ø mm H 19 x 16 x 23
What is this article?
Cork stoppers, first-class quality, low-porous Ø mm H 19 x 16 x 23 is the article on this page. Luminix Health distributes Hecht 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. Delivery across Europe, two to five days when in stock. 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.