Description
Silicone stopper with upper diameter 16,5 mm, lower diameter 12,5 mm and length 20 mm is a transparent, flexible laboratory stopper for sealing glassware and other vessels in routine lab work. Made from silicone, it combines elasticity with a tapered profile that supports a secure fit in openings matching these dimensions. The clear material allows visual checks of the stopper position and the vessel neck during setup and handling. Supplied in a practical pack of 10 pieces, this format suits stocking multiple workstations or preparing parallel experiments. Each piece has a net weight of 0,004 kg, keeping handling light for frequent use. The stopper belongs to the standard silicone stopper range used alongside cork, rubber and cellulose stoppers in general laboratory practice. Dimensions are specified as upper Ø 16,5 mm, lower Ø 12,5 mm and length 20 mm, so selection against flask, tube or bottle necks is straightforward. This silicone stopper from manufacturer Witeg offers a simple, reusable sealing option for teaching labs, quality-control benches and research workflows where a transparent, flexible plug of defined size is required without further specialised coatings or fittings.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 10 pc(s)
- Material: Silicone
- Upper diameter: 16,5 mm
- Lower diameter: 12,5 mm
- Length: 20 mm
- Appearance: Transparent, flexible
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Questions about Silicone plug O-Ø 16.5mm U-Ø 12.5mm length 20mm
What is this article?
Silicone plug O-Ø 16.5mm U-Ø 12.5mm length 20mm 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. 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.