Description
Solid rubber stopper with a top diameter of 18 mm, a bottom diameter of 14 mm and a length of 20 mm offers a tapered laboratory seal for medium-narrow necks on flasks, bottles and glassware. Made entirely of rubber in a solid construction, it delivers elastic contact against vessel walls to help keep samples secure and reduce vapour loss during storage, transport or short-term reactions. The 18 mm to 14 mm taper and 20 mm overall length allow stable seating while still permitting straightforward insertion and withdrawal by hand. Net weight is 0,004 kg, so the stopper remains light for racks and trays yet robust for repeated laboratory cycles. Available as a single piece from manufacturer Witeg, this gum stopper suits chemistry, life-science and educational settings that specify a solid rubber closure of these dimensions. It is a practical choice wherever a simple, reusable stopper without holes or special coatings is needed for everyday sealing tasks on the bench.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Material: Rubber
- Design: Solid
- Top diameter: 18 mm
- Bottom diameter: 14 mm
- Length: 20 mm
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Questions about Plug Ø top 18mm Ø bottom 14mm length 20mm
What is this article?
Plug Ø top 18mm Ø bottom 14mm 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. 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.